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The First Two Rules of Noon Sakinah and Tanween in Tajweed: Izhar and Idgham (Complete Beginner’s Guide)
One of the most important aspects of properly reciting the Qur’an is Tajweed , the science that teaches Muslims how to pronounce Qur’anic letters correctly and beautifully as they were revealed to the Prophet Muhammad ﷺ.
Among the foundational topics of Tajweed is understanding the rules of Noon Sakinah (نْ) and Tanween (ً ٍ ٌ). These rules determine how the sound of the letter Noon (ن) should be pronounced depending on the letter that comes after it.
If you have ever listened to skilled Qur’an reciters, you may have noticed that sometimes the Noon sound is pronounced clearly, while other times it blends into the next letter or changes its sound. These variations are not random , they follow specific Tajweed rules.
There are four main rules of Noon Sakinah and Tanween, but in this article we will focus in depth on the first two rules:
- Izhar (الإظهار) – Clear pronunciation
- Idgham (الإدغام) – Merging or assimilation
These two rules form the foundation of understanding Noon Sakinah and Tanween, and mastering them greatly improves Qur’anic recitation.
This comprehensive guide will explain:
- What Noon Sakinah and Tanween are
- Why these rules exist
- The detailed explanation of Izhar
- The detailed explanation of Idgham
- Letters of each rule
- Qur’anic examples
- Practical pronunciation tips
- Common mistakes students make
- How to practice effectively
This article is written especially for beginners and new Muslims, so every concept will be explained step-by-step.
Understanding Noon Sakinah and Tanween
Before discussing the rules themselves, we must first understand what Noon Sakinah and Tanween actually are.
What is Noon Sakinah (النون الساكنة) ?
Definition:
Noon Sakinah is the letter Noon (ن) that has a sukoon (ْ) over it, meaning it has no vowel and is pronounced with a natural “n” sound.
Example
نْ
Examples in Qur’anic words:
- مِنْ (min)
- أَنْ (an)
- عَنْ (ʿan)
When reciting, the Noon Sakinah sound is pronounced without any vowel movement, simply as “n”.
What is Tanween (التنوين) ?
Tanween refers to the double vowel marks at the end of nouns in Arabic.
These are:
- Fathatain: ً
- Kasratain: ٍ
- Dammatain: ٌ
Tanween produces a sound similar to Noon Sakinah, adding an “n” sound at the end of a word.
Examples
كِتَابٌ
(kitaabun)
عَلِيمًا
(ʿaleeman)
هُدًى
(hudan)
Notice that Tanween sounds like a hidden Noon at the end of the word.
Why Are There Rules for Noon Sakinah and Tanween?
Arabic pronunciation changes depending on the letters that come next.
For example, in many languages’ sounds merge or change to make speech smoother.
Similarly, in Qur’anic recitation:
- Sometimes the Noon sound is pronounced clearly
- Sometimes it merges with the next letter
- Sometimes it changes sound
- Sometimes it becomes hidden
These changes create the four Tajweed rules:
- Izhar (Clear pronunciation)
- Idgham (Merging)
- Iqlab (Conversion)
- Ikhfa (Concealment)
In this article we will explore the first two rules in great depth.
Rule 1: Izhar (الإظهار)
Definition of Izhar
Izhar literally means “clarity” or “making something apparent.”
In Tajweed, Izhar means:
Pronouncing the Noon Sakinah or Tanween clearly without merging or hiding it when followed by certain letters.
The Noon sound is pronounced fully and distinctly.
The Letters of Izhar
Izhar occurs when Noon Sakinah or Tanween is followed by one of six letters.
These letters are known as the throat letters (حروف الحلق) because they are pronounced from the throat.
The six letters are:
ء
ه
ع
ح
غ
خ
These letters are often memorized using the phrase:
أخي هاك علما حازه غير خاسر
Why Izhar Happens
The reason for Izhar is the distance between the articulation points.
The Noon sound comes from the tip of the tongue touching the upper gums, while the Izhar letters come from the throat.
Because these articulation points are far apart, the sounds cannot merge smoothly.
Therefore, the Noon sound must be pronounced clearly.
How to Pronounce Izhar
When Izhar occurs:
- Pronounce the Noon sound clearly
- Do not merge it with the next letter
- Do not nasalize excessively
- Move cleanly to the next letter
Example pattern:
نْ + throat letter
or
Tanween + throat letter
Qur’anic Examples of Izhar
Example 1
مِنْ هَادٍ
The Noon Sakinah is followed by ه.
The Noon is pronounced clearly:
min hād
Example 2
مِنْ عِلْمٍ
The Noon is followed by ع.
It remains clear:
min ʿilm
Example 3
عَلِيمٌ حَكِيمٌ
Tanween followed by ح.
The n sound remains clear.
Example 4
سَمِيعٌ عَلِيمٌ
Tanween followed by ع.
Again, the Noon sound is pronounced clearly.
Types of Izhar
Some scholars divide Izhar into three subcategories depending on the throat position.
- Lowest throat letters
ء
ه
Example:
مِنْ هَادٍ
- Middle throat letters
ع
ح
Example:
مِنْ عِلْمٍ
- Upper throat letters
غ
خ
Example:
مِنْ خَيْرٍ
Common Mistakes in Izhar
Many beginners make mistakes when learning Izhar.
Mistake 1: Merging the sound
Some learners accidentally merge the Noon with the next letter.
Example mistake:
min-hād becomes mi-hād.
The Noon disappears, which is incorrect.
Mistake 2: Over-nasalization
Izhar does not require heavy nasal sound (ghunnah).
The Noon should be natural and clear.
Mistake 3: Dropping the Noon completely
This often happens when reading quickly.
Correct recitation must maintain the Noon sound clearly.
Practical Tips to Master Izhar
Tip 1: Practice slowly
Slow recitation helps you pronounce each letter clearly.
Tip 2: Identify throat letters
Memorize the six letters until recognition becomes automatic.
Tip 3: Listen to skilled reciters
Listening helps train your ear.
Famous reciters known for clear Tajweed include:
- Abdul Basit
- Mishary Rashid Al-Afasy
- Husary
Tip 4: Recite with a teacher
Tajweed is traditionally learned through oral transmission.
A teacher can immediately correct mistakes.
Rule 2: Idgham (الإدغام)
Definition of Idgham
Idgham means “to merge” or “to insert something into something else.”
In Tajweed, Idgham means:
Merging the Noon Sakinah or Tanween into the following letter so that they become one combined sound.
This merging makes recitation smoother and more natural.
The Letters of Idgham
There are six Idgham letters.
They are:
ي
ر
م
ل
و
ن
These letters are often remembered using the word:
يرملون
Two Types of Idgham
Idgham is divided into two categories.
1. Idgham with Ghunnah (nasal sound)
Occurs with the letters:
ي
ن
م
و
These letters are remembered as:
ينمو
2. Idgham without Ghunnah
Occurs with the letters:
ل
ر
Idgham with Ghunnah
Definition
When Noon Sakinah or Tanween is followed by ي ن م و, the Noon sound merges with the next letter while producing a nasal sound (ghunnah).
Example 1
مَنْ يَعْمَلْ
Noon followed by ي
Pronounced:
may-yaʿmal
Example 2
مِنْ مَالٍ
Noon followed by م
Pronounced with nasal merging.
Example 3
هُدًى وَرَحْمَةً
Tanween followed by و
Pronunciation Method
- Merge the Noon with the next letter
- Hold a nasal sound for about two counts
- The Noon itself disappears but its nasal quality remains
Idgham Without Ghunnah
Definition
When Noon Sakinah or Tanween is followed by ل or ر, the Noon merges completely without nasal sound.
Example 1
مِنْ رَبِّهِمْ
Pronounced:
mir-rabbihim
Example 2
مِنْ لَدُنْهُ
Pronounced:
mil-ladunhu
Example 3
غَفُورٌ رَحِيمٌ
Tanween merges into ر.
Key Difference
Type | Letters | Nasal Sound |
Idgham with Ghunnah | ي ن م و | Yes |
Idgham without Ghunnah | ل ر | No |
Important Condition of Idgham
Idgham only occurs when:
Noon Sakinah or Tanween is at the end of one word and the Idgham letter is at the beginning of the next word.
Example:
مِنْ رَبِّهِمْ
However, if both letters occur within the same word, Idgham does not occur.
Example:
دُنْيَا
Even though ن is followed by ي, Idgham does not apply because it is one word.
Wisdom Behind Idgham
Arabic is a language of fluid pronunciation.
Idgham helps:
- Make recitation smoother
- Prevent awkward pauses
- Maintain beautiful rhythm
This beauty of sound is one of the miraculous aspects of Qur’anic recitation.
Comparing Izhar and Idgham
Feature | Izhar | Idgham |
Meaning | Clear pronunciation | Merging |
Noon sound | Fully pronounced | Merged |
Letters | ء ه ع ح غ خ | يرملون |
Nasal sound | No | Sometimes |
Purpose | Clarity | Smoothness |
How to Practice These Rules
Learning Tajweed requires consistent practice.
Step 1: Memorize the letters
Know instantly:
Izhar letters
Idgham letters
Step 2: Identify Noon Sakinah and Tanween
Look for:
نْ
ً ٍ ٌ
Step 3: Check the next letter
The following letter determines the rule.
Step 4: Apply the correct pronunciation
Clear sound → Izhar
Merged sound → Idgham
Step 5: Recite Qur’an regularly
Even 10–15 minutes daily improves Tajweed greatly.
Where did these rules come from?
Rules such as Izhar (clear pronunciation) and Idgham (merging) can appear very technical when presented in Tajweed books. Learners sometimes imagine that scholars invented these rules later to make Qur’anic recitation more complex.
However, the reality is very different.
The rules of Tajweed were not invented by scholars. Instead, they were observed, preserved, and explained by scholars after the time of the Prophet ﷺ. These rules reflect the natural pronunciation patterns of classical Arabic, the language spoken by the Arabs at the time the Qur’an was revealed.
In other words:
- The Arabs already spoke this way naturally.
- The Prophet ﷺ recited the Qur’an in that same natural Arabic pronunciation.
- Later scholars analyzed and documented these pronunciation patterns using the science of linguistics and phonetics.
The Role of Oral Transmission
Before discussing linguistics, it is important to understand that the Qur’an was transmitted primarily through oral recitation.
The Prophet ﷺ taught the Qur’an directly to his companions.
They learned by listening carefully and repeating.
This process continued generation after generation through what scholars call:
التلقي والمشافهة
Meaning:
“Direct receiving and oral transmission.”
Through this method, Muslims preserved not only the words of the Qur’an, but also the exact way they were pronounced.
Early Development of Tajweed as a Science
For the first generations of Muslims, Tajweed rules were not written in books.
The companions and early Arabs already knew the correct pronunciation instinctively, because it was their native language.
However, as Islam spread beyond Arabia, many new Muslims did not speak Arabic natively. This created a need to document the correct pronunciation.
This led to the development of Tajweed as a scientific discipline.
Linguistics and Phonetics in Arabic
Modern linguistics studies how speech sounds are produced.
This field is known as phonetics.
Phonetics examines:
- articulation points
- airflow
- tongue position
- sound assimilation
Interestingly, classical Arabic scholars analyzed these features over a thousand years ago.
They identified the makharij al-huruf (articulation points) and sifat al-huruf (characteristics of letters).
These principles explain why Izhar and Idgham occur.
What Is Idgham in Linguistic Terms?
In modern linguistics, Idgham is called:
assimilation
Assimilation occurs when one sound becomes similar to a nearby sound to make pronunciation easier.
This phenomenon occurs in many languages worldwide.
Example in English
Consider the phrase:
handbag
Many speakers pronounce it as:
hambag
The letter n changes toward m because of the following b.
This is exactly the same type of process seen in Arabic Iqlab and Idgham.
Idgham as Assimilation
In Tajweed, Idgham occurs when the sound of Noon Sakinah or Tanween merges into the following letter.
For example:
مِن رَبِّهِم
Instead of pronouncing:
min rabbihim
It becomes:
mir-rabbihim
The Noon sound merges into the ر.
From a phonetic perspective, this happens because the tongue position for Noon and Ra are very close.
Merging the sounds makes speech smoother and more efficient.
Izhar as Clear Articulation
Izhar is the opposite situation.
Izhar occurs when Noon is followed by throat letters:
ء ه ع ح غ خ
These letters are produced in the throat, while Noon is produced at the tip of the tongue.
Because these articulation points are far apart, assimilation is difficult.
Therefore, the Noon remains fully pronounced.
This explains Izhar from a purely phonetic perspective.
Did the Arabs Naturally Use Idgham?
Yes.
Historical linguistic evidence shows that assimilation was common in classical Arabic speech.
Arabic poetry from the pre-Islamic era (before the Qur’an) already demonstrates these pronunciation patterns.
This indicates that Idgham was part of natural Arabic phonology.
Why the Arabs Used Idgham?
Languages naturally evolve toward ease of pronunciation.
When two similar sounds meet, merging them reduces effort.
In Arabic speech, this made words flow smoothly.
For example:
مِنْ رَبِّهِم
If pronounced fully without merging, the transition between sounds would be slightly heavier.
Assimilation simplifies articulation.
Why Izhar Occurs Instead
When articulation points are far apart, merging sounds becomes difficult.
For example:
مِنْ هَادٍ
The sound n comes from the tongue.
The sound h comes from the throat.
Because these sounds are produced in very different places, assimilation does not occur.
Thus the Noon remains clear.
How Tajweed Scholars Identified These Rules
Scholars identified Tajweed rules by studying three main sources:
- Recitation of the Prophet ﷺ
The companions carefully preserved the Prophet’s pronunciation.
- Native Arabic speech
The early scholars were themselves native Arabic speakers.
They recognized natural phonetic patterns.
- Linguistic analysis
Scholars studied articulation points and sound characteristics.
They then categorized the observed pronunciation patterns.
Tajweed as Early Phonetic Science
Remarkably, classical Islamic scholars developed phonetic analysis centuries before modern linguistics.
They carefully described:
- tongue positions
- throat articulation
- nasal resonance
- sound assimilation
Their analysis closely resembles modern phonetics.
For example:
Ghunnah corresponds to nasal resonance.
Makharij correspond to articulation points.
Why These Rules Matter in Qur’anic Recitation
One might ask:
If these patterns were natural speech habits, why emphasize them so strongly in Qur’anic recitation?
The answer lies in preservation.
The Qur’an is not simply a written text.
It is a recited revelation.
Preserving the original pronunciation ensures that the Qur’an is recited exactly as it was revealed.
The Verses of Tuhfat al-Atfāl About Izhar and Idgham
When discussing the rules of Izhar and Idgham, it is very beneficial to mention the famous classical Tajweed poem Tuhfat al‑Atfāl.
This short poem has been memorized by students of Qur’anic recitation for centuries because it summarizes the major Tajweed rules in a clear and rhythmic way. It was written by the Egyptian scholar Sulayman al‑Jamzuri, and it remains one of the most widely taught introductory texts in Tajweed.
In the poem, the author describes the rules of Noon Sakinah and Tanween, including Izhar and Idgham, in a concise and memorable form.
The Verse About Izhar
The author says:
فَالأَوَّلُ الإِظْهَارُ قَبْلَ أَحْرُفِ
لِلْحَلْقِ سِتٌّ رُتِّبَتْ فَلْتُعْرَفِ
Translation:
“The first rule is Izhar before six letters
of the throat, arranged — so know them.”
He then lists those letters in the next line:
هَمْزٌ فَهَاءٌ ثُمَّ عَيْنٌ حَاءُ
مُهْمَلَتَانِ ثُمَّ غَيْنٌ خَاءُ
Meaning:
“They are: Hamzah, then Hā’, then ʿAyn and Ḥā’,
followed by Ghain and Khā’.”
The Verse About Idgham
Later in the poem, the author explains the second rule:
وَالثَّانِ إِدْغَامٌ بِسِتَّةٍ أَتَتْ
فِي يَرْمَلُونَ عِنْدَهُمْ قَدْ ثَبَتَتْ
Translation:
“The second rule is Idgham, which occurs with six letters
gathered in the word Yarmalūn.”
The Two Types of Idgham in the Poem
The poem continues by explaining that Idgham has two types:
لَكِنَّهَا قِسْمَانِ قِسْمٌ يُدْغَمَا
فِيهِ بِغُنَّةٍ بِيَنْمُو عُلِمَا
Translation:
“But it is divided into two categories:
one in which merging occurs with ghunnah, known as ‘Yanmu.’”
The letters of Idgham with Ghunnah are gathered in the word:
ينمو
Then the poet continues:
إِلَّا إِذَا كَانَا بِكِلْمَةٍ فَلَا
تُدْغِمْ كَدُنْيَا ثُمَّ صِنْوَانٍ تَلَا
Meaning:
“Except when they occur in the same word —
then do not merge them, like in the words dunyā and ṣinwān.”
This verse teaches an important condition:
Idgham generally occurs between two words, not inside the same word.
Finally, the poet explains the second type of Idgham:
وَالثَّانِ إِدْغَامٌ بِغَيْرِ غُنَّةٍ
فِي اللَّامِ وَالرَّا ثُمَّ كَرِّرَنَّهُ
Translation:
“The second type of Idgham is without ghunnah,
and it occurs in the letters Lām and Rā’.”
Thus:
- Idgham with ghunnah: ي ن م و
- Idgham without ghunnah: ل ر
Why This Poem Is Important
Tuhfat al-Atfāl became one of the most famous Tajweed poems because it helps students memorize rules easily.
Instead of memorizing long explanations, students memorize short poetic lines that summarize the rules.
For example:
- Izhar letters are taught through the verses describing throat letters.
- Idgham letters are summarized in the word يرملون.
- Idgham with ghunnah is summarized in ينمو.
These memory aids help students recall the rules quickly during recitation.
Spiritual Importance of Learning Tajweed
Reciting the Qur’an correctly is not only a linguistic skill — it is an act of worship.
Allah says in the Qur’an:
وَرَتِّلِ الْقُرْآنَ تَرْتِيلًا
“And recite the Qur’an with measured recitation.”
(Qur’an 73:4)
The Prophet ﷺ also said:
“The one who recites the Qur’an skillfully will be with the noble righteous scribes.”
(Sahih al-Bukhari and Sahih Muslim)
This shows that learning proper recitation is a highly rewarded act of worship.
Frequently Asked Questions
Are Izhar and Idgham mandatory in recitation?
Yes. These rules are part of Tajweed, which preserves the correct pronunciation of the Qur’an.
Do beginners have to perfect Tajweed immediately?
No. Scholars emphasize gradual learning. A beginner should focus on improvement over time, not perfection instantly.
Is Tajweed required for prayer?
For prayer to be valid, one must recite Surah Al-Fatihah correctly enough that meanings are not distorted.
However, learning Tajweed improves recitation and is highly recommended.
Final Summary
The rules of Noon Sakinah and Tanween are foundational elements of Tajweed.
The first two rules are:
Izhar (Clear Pronunciation)
Occurs when Noon Sakinah or Tanween is followed by:
ء ه ع ح غ خ
The Noon sound is pronounced clearly without merging.
Idgham (Merging)
Occurs when Noon Sakinah or Tanween is followed by:
ي ر م ل و ن
The Noon sound merges with the next letter.
Two types exist:
- With ghunnah: ي ن م و
- Without ghunnah: ل ر
Mastering these rules helps Muslims:
- Recite the Qur’an more beautifully
- Preserve the original pronunciation
- Strengthen their connection with the Qur’an
- Follow the tradition of the Prophet ﷺ
Tajweed may seem complex at first, but with practice, patience, and guidance, it becomes natural.
Every effort spent learning the Qur’an is rewarded.
As the Prophet ﷺ said:
“The best among you are those who learn the Qur’an and teach it.”
(Sahih al-Bukhari)
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