Idgham Mutamathilayn, Mutajanisayn, and Mutaqaribayn

When two letters meet in Quranic recitation, the relationship between them determines how they’re pronounced. Three specific merging rules govern these encounters, and mastering them transforms choppy recitation into smooth, connected tarteel.

Understanding Idgham Mutamathilayn, Mutajanisayn, and Mutaqaribayn gives you precise control over letter transitions. These three rules cover identical letters merging, same-origin letters blending, and neighboring letters fusing — each with distinct conditions and applications throughout the Quran.

What is Idgham Mutamathilayn?

Idgham Mutamathilayn occurs when two identical letters meet — sharing the exact same makhraj (articulation point) and sifah (attribute) — and the first is saakin (sukoon) while the second is mutaharrik (voweled). The two letters merge completely into one doubled, shaddah-bearing letter.

This is the most straightforward merging rule because both letters are genuinely identical. When you see two consecutive matching letters where the first carries sukoon, you don’t pronounce it independently — you merge into the second with a shaddah.

1. The Three Subcategories of Idgham Mutamathilayn

Scholars of Tajweed divide Idgham Mutamathilayn into three types based on the vowel state of both letters:

Type	First Letter	Second Letter	Ruling
Sagheer (Small)	Saakin	Mutaharrik	Idgham (merge)
Kabeer (Large)	Mutaharrik	Mutaharrik	Izhar for most readers
Mutlaq (Absolute)	Mutaharrik	Saakin	Izhar (no merging)

Examples of Idgham Mutamathilayn Sagheer

The Sagheer type is the most commonly applied and appears both within a single word and across two words.

Idgham Mutamathilayn Within one word:

يُدْرِككُّمُ
Yudrik-kum
“He will overtake you” (Al-Baqarah 2:148) 

Kaf saakin merges into the following Kaf mutaharrik

Idgham Mutamathilayn Across two words:

قَدْ دَخَلُوا
Qad-dakhaloo
“They have entered” (Al-Mujadila 58:8) 

Dal saakin merges into Dal mutaharrik

The Special Case of Medd Letters in Idgham Mutamathilayn

Huroof al-madd (ا، و، ي) follow different rules when they meet identical letters. A medd Waw or Yaa in its madd condition takes the ruling of madd — not idgham.

For example, قَالُواْ وَأَقْبَلُواْ — the Waw here is a madd letter, so it is not merged into the following Waw. The madd ruling takes precedence.

However, if the Waw or Yaa loses its madd condition, idgham applies. Compare:

فَنَادَوْا وَّلَاتَ
Fanaadaw-wallaat 

Waw without madd condition merges into the following Waw

Ghunnah in Idgham Mutamathilayn with Examples

Most cases of Idgham Mutamathilayn are without ghunnah. Two exceptions carry ghunnah:

• Meem into Meem — produces complete labial idgham (Shafawi) with ghunnah of two counts

مِنكُم مَّرْضَى
Minkum-mardaa
“Among you are the sick” (Al-Muzzammil 73:20)

• Noon into Noon — produces complete idgham with ghunnah of two counts

مِّن نِّعْمَةٍ
Min-ni’mah
“Of any blessing” (An-Nahl 16:53)

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Read also: Idgham Shafawi

What is Idgham Mutajanisayn?

Idgham Mutajanisayn occurs when two letters share the same makhraj but differ in their sifaat (attributes). The first must be saakin and the second mutaharrik. Because they emerge from identical articulation territory, the first letter is absorbed into the second.

The word mutajanisayn means “homogeneous pair” — same origin, different character. This rule is more nuanced than Mutamathilayn because you must identify letters sharing a makhraj despite being different letters altogether.

1. The Three Articulation Groups Governing Idgham Mutajanisayn

Idgham Mutajanisayn operates across three specific makhraj groups. Outside these groups, merging does not apply.

Makhraj Group	Letters	Merging Direction	Example
Tip of tongue (front)	ت، ط، د	Taa into Taa / Taa into Daal and vice versa	قَدْ تَّبَيَّنَ
Tip of tongue (slightly back)	ث، ذ، ظ	Thaa into Dhaal / Dhaal into Zhaa	يَلْهَث ذَّلِكَ / إِذ ظَّلَمْتُمْ
Lips	ب، م	Baa into Meem	ارْكَب مَّعَنَا

2. Examples of Idgham Mutajanisayn in the Taa-Taa-Daal Group

This group contains the most applications in the Quran. An important precision point: Taa merges into Taa and into Daal, and Daal merges into Taa — but Taa does NOT merge into Taa when the Taa carries a makhraj strength disadvantage.

قَدْ تَّبَيَّنَ
Qat-tabayyana
“It has become clear” (Al-Baqarah 2:256) 

Daal saakin merges into Taa mutaharrik

لَهَمَّت طَّائِفَةٌ
Lahamma-ttaaifah
“A group had intended” (An-Nisa 4:113) 

Taa saakin merges into Taa [Taa] mutaharrik

A critical precision: بَسَطتَ and أَحَطتُ are NOT cases of idgham. The Taa here is saakin and the following letter is Taa — but the Taa carries a stronger articulation than the following Taa, so izhar applies. Pronounce the Taa saakin without qalqalah, then articulate the Taa clearly.

3. Examples of Idgham Mutajanisayn in the Thaa-Dhaal-Zhaa Group

Only two positions exist here, both obligatory for Hafs ‘an ‘Asim:

يَلْهَث ذَّلِكَ
Yalhadh-dhalik
“It pants with its tongue” (Al-A’raf 7:176)

Thaa saakin merges into Dhaal

إِذ ظَّلَمْتُمْ
Idh-zhalamtum
“When you wronged” (Az-Zukhruf 43:45) 

Dhaal saakin merges into Zhaa

4. Examples of Idgham Mutajanisayn in the Baa-Meem Group

This is the only position where Idgham Mutajanisayn carries ghunnah, making it technically an Idgham Kabeer by some scholars’ classification. There is only one instance in the entire Quran for Hafs:

يَا بُنَيَّ ارْكَب مَّعَنَا
Yaa bunayy-irkam-ma’anaa
“O my son, ride with us” (Hud 11:42) 

Baa saakin merges into Meem, producing ghunnah of two counts

This single example is unique — it’s the only ghunnah-carrying Mutajanisayn case in Hafs recitation, Alhamdulillah.

Working with Ijazah-certified instructors at Learn Quran Tajweed Academy through our Practical Tajweed Course provides the real-time error correction these subtle distinctions require — something self-study simply cannot replicate.

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Read also: Idgham in Tajweed: Rules, Types, Letters, and Quranic Examples

What is Idgham Mutaqaribayn?

Idgham Mutaqaribayn occurs when two letters are close — but not identical or same-makhraj — in their articulation point, with the first saakin and the second mutaharrik. Nearness of makhraj creates a natural tendency toward merging.

The word mutaqaribayn means “two approximates.” These letters don’t share the exact same origin, but their proximity makes independent full articulation of the first letter awkward in connected speech.

Examples of Idgham Mutaqaribayn

For Hafs ‘an ‘Asim, Idgham Mutaqaribayn is limited to precisely two positions in the Quran — no more.

1. Laam Merging into Raa

The first position involves Laam saakin followed by Raa mutaharrik. Laam and Raa both originate near the tip of the tongue, making this the most natural merging pair.

بَلْ رَّفَعَهُ اللَّهُ
Bal-rafa’ahullah
“Rather, Allah raised him” (An-Nisa 4:158) 

Laam saakin fully merges into Raa mutaharrik

وَقُل رَّبِّ ارْحَمْهُمَا
Waqur-rabbir-hamhumaa
“And say: My Lord, have mercy on them” (Al-Isra 17:24)

An important rule: the merging is one-directional. Raa saakin followed by Laam does NOT produce idgham. In وَيَغْفِرْ لَكُمْ, the Raa saakin before Laam requires full izhar.

2. Qaaf Merging into Kaaf

The second position is a single verse in the entire Quran — one of the most precisely defined rules in Tajweed:

أَلَمْ نَخْلُقكُّم
Alam nakhluk-kum
“Did We not create you?” (Al-Mursalat 77:20)

Here, Qaaf saakin meets Kaaf mutaharrik. Two valid options exist for the reciter:

• Complete idgham (Idgham Kaamil): Qaaf fully merges, Kaaf is doubled, no trace of Qaaf remains — reads as “nakhluk-kum”
• Incomplete idgham (Idgham Naaqis): Qaaf merges into Kaaf with Kaaf taking shaddah, but the sifah of Isti’laa (elevation) carried by Qaaf remains audible on the Kaaf

Both readings are authentically transmitted. The reciter may choose either.

A Comparative Summary of All Three Types

Rule	Letters	Makhraj	Sifaat	Condition	Ghunnah?
Mutamathilayn	Identical	Same	Same	1st saakin, 2nd mutaharrik	Only with Noon+Noon / Meem+Meem
Mutajanisayn	Different	Same	Different	1st saakin, 2nd mutaharrik	Only Baa+Meem (Hud 11:42)
Mutaqaribayn	Different	Near/Close	Different	1st saakin, 2nd mutaharrik	No

Common Recitation Errors Students Must Avoid

Students working through these three rules consistently make identifiable errors. Recognizing them early prevents deeply ingrained habits from forming.

In Mutamathilayn: Many students apply a light qalqalah to the first letter before merging — especially with Daal. Remember: a saakin letter entering idgham has no independent articulation at all.

In Mutajanisayn: Students often attempt to merge بَسَطتَ and أَحَطتُ because they see two tongue-tip letters. This is incorrect for Hafs. Taa does not merge into Taa here because the Taa carries superior makhraj strength.

In Mutaqaribayn: Some students extend the ghunnah in the Qaaf-Kaaf example, treating it like Noon or Meem idgham. No ghunnah exists in Mutaqaribayn under Hafs ‘an ‘Asim.

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Conclusion

These three idgham categories — identical, same-makhraj, and neighboring letters — together govern how the Arabic of the Quran flows without interruption. Recognizing which rule applies at each encounter builds the phonetic awareness that distinguishes a careful reciter.

Applying them consistently separates theoretical Tajweed knowledge from genuinely polished recitation. Each rule has precise boundaries, and staying within those boundaries is what authentic transmission of Hafs ‘an ‘Asim requires.

The Quran was revealed with this internal harmony intentionally embedded. Every merging point is an invitation toward deeper connection with the text — and deeper precision in how you honor it.