Idgham in Tajweed: The 6 Letters of Merging With Easy Examples

Idgham in tajweed is one of the first rules your ear notices when a skilled reciter reads the Quran: two sounds flow into one, smoothly and beautifully. If you or your child have already learned ikhfa (hiding), idgham is the natural next step. In this guide we explain what idgham means, its six letters, the difference between idgham with and without ghunnah, clear Quran examples, and the mistakes we hear most often from students learning abroad.

What Is Idgham in Tajweed?

The word idgham (إدغام) means “merging” or “inserting one thing into another”. In tajweed, it means that a letter with sukoon is merged into the letter after it, so the two are pronounced as one stressed (mushaddad) letter.

The most common place you will meet idgham is with noon sakinah (نْ) and tanween (ـًـٍـٌ). Remember that tanween is simply a noon sakinah that is pronounced but not written. When either of them is followed by one of six letters, the noon sound is merged into the next letter.

The 6 Letters of Idgham: يَرْمَلُونَ

Scholars of tajweed collected the six letters in one easy word: يَرْمَلُونَ (yarmaloon). The letters are:

• ي (ya)
• ر (ra)
• م (meem)
• ل (lam)
• و (waw)
• ن (noon)

These six letters are split into two groups, and that split is the heart of idgham in tajweed.

Idgham With Ghunnah (Bi Ghunnah): ينمو

Four of the letters are merged with a nasal sound (ghunnah) held for about two counts. They are gathered in the word يَنْمُو (yanmoo): ي، ن، م، و.

Examples from the Quran:

• مَن يَقُولُ (Al-Baqarah 2:8) – read as “may-yaqoolu”, with ghunnah.
• مِن نِّعْمَةٍ – the two noons become one stressed noon with ghunnah.
• مِن مَّاءٍ – the noon disappears into the meem, and the meem carries the ghunnah.
• مِن وَالٍ (Ar-Ra’d 13:11) – the noon merges into the waw with a nasal sound.
• خَيْرًا يَرَهُ (Az-Zalzalah 99:7) – the tanween merges into the ya.

With ya and waw, the idgham is called incomplete (naqis), because a trace of the noon remains in the ghunnah. With noon and meem it is complete (kamil), because the noon fully becomes the next letter.

Idgham Without Ghunnah (Bila Ghunnah): ل and ر

The remaining two letters, lam (ل) and ra (ر), are merged completely with no nasal sound. The noon simply vanishes and the lam or ra is read with a shaddah.

• هُدًى لِّلْمُتَّقِينَ (Al-Baqarah 2:2) – read “hudal-lil-muttaqeen”.
• مِّن رَّبِّهِمْ (Al-Baqarah 2:5) – read “mir-rabbihim”.
• غَفُورٌ رَّحِيمٌ – read “ghafoorur-raheem”.
• وَيْلٌ لِّكُلِّ (Al-Humazah 104:1) – read “wailul-li-kulli”.

A helpful tip for children: in many printed mushafs, the letter after the noon carries a shaddah. That shaddah is a visual reminder that merging is happening.

The Important Condition: Two Separate Words

In idgham in tajweed, the merging of noon sakinah only happens when the noon is at the end of one word and the idgham letter is at the start of the next word. If both are inside one word, there is no idgham; the noon is pronounced clearly. This is called izhar mutlaq, and it occurs in only four words in the Quran:

• الدُّنْيَا (ad-dunya)
• بُنْيَانٌ (bunyan)
• قِنْوَانٌ (qinwan)
• صِنْوَانٌ (sinwan)

If these words were merged, their meaning would become unclear, so the noon is kept.

Special Cases in the Riwayah of Hafs

In the common recitation of Hafs ‘an ‘Asim, there are a few well-known exceptions your teacher will point out:

• يس ۝ وَالْقُرْآنِ (Ya-Sin 36:1-2) and ن ۚ وَالْقَلَمِ (Al-Qalam 68:1): the noon is read clearly, without idgham.
• مَنْ ۜ رَاقٍ (Al-Qiyamah 75:27): a short pause (sakt) is made on the noon, so there is no idgham.

These are best learned by listening to a qualified teacher, since they are tied to how the verses were transmitted.

Other Kinds of Idgham You Will Meet

Idgham in tajweed is a wider idea than noon sakinah alone. As you progress, you will also learn:

• Idgham shafawi: meem sakinah followed by another meem, e.g. لَهُم مَّا, read with ghunnah.
• Idgham mutamathilayn: two identical letters meet, e.g. اضْرِب بِّعَصَاكَ.
• Idgham mutajanisayn: two letters from the same point of articulation, e.g. قَد تَّبَيَّنَ.
• Idgham mutaqaribayn: two letters close in articulation, e.g. قُل رَّبِّ.

For beginners, mastering the noon sakinah rule first makes all of these much easier. If you are just starting, our guide to tajweed for beginners gives you the foundation.

Common Mistakes With Idgham in Tajweed

• Pronouncing the noon anyway. Saying “min-rabbihim” instead of “mir-rabbihim” is the most frequent error.
• Adding ghunnah to lam and ra. Many learners carry the nasal sound from ينمو into ل and ر by habit.
• Cutting the ghunnah short. With ي، ن، م، و, the ghunnah should be held for about two counts, not rushed.
• Merging inside one word. Reading “ad-duyya” instead of “ad-dunya” changes the word.

How to Practise Idgham at Home

Practising idgham in tajweed works best in short, regular sessions rather than one long lesson a week.

1. Listen first. Play a slow, clear recitation of Juz Amma and raise a hand each time you hear a merge.
2. Colour-code. Ask your child to underline idgham with ghunnah in one colour and without ghunnah in another.
3. Short surahs. Surah Al-Humazah, Az-Zalzalah and Al-Bayyinah contain clear examples.
4. Record and compare. Recording a few verses and comparing them with a reciter builds the ear quickly.
5. Get feedback. A teacher can hear small errors that are hard to notice on your own.

FAQ About Idgham in Tajweed

How many letters of idgham are there?

Six letters, collected in the word يَرْمَلُونَ: ya, ra, meem, lam, waw and noon.

Which idgham letters have ghunnah?

Four letters: ي، ن، م، و (يَنْمُو). Lam and ra are merged without ghunnah.

How long is the ghunnah in idgham?

About two counts (harakat), the same length used in ikhfa and in a stressed noon or meem.

Why is there no idgham in “dunya”?

Because the noon and the ya are in the same word. Idgham of noon sakinah only applies across two words.

Can children learn idgham?

Yes, children can learn idgham in tajweed. Once a child reads fluently from the Noorani Qaida and knows noon sakinah and tanween, idgham can be taught with short surahs and lots of listening.

Book a Free Trial Class

Learning idgham in tajweed from a page is a great start, but tajweed truly settles in when a teacher listens to you and corrects you gently, one verse at a time. At Telawah Academy we teach Quran, tajweed, hifz and Arabic online for children and adults living in the USA, Canada, the UK, Europe and Australia, at times that suit your family.

Book your free trial class today on WhatsApp: https://wa.me/201042642933 (+20 10 42642933). We would be happy to help you or your child take the next step with the Book of Allah.