Quick Facts
- Level
- Essential
- Category
- Noon and Tanween
- When it occurs
- It occurs when Noon Sakinah or Tanween at the end of one word is followed across the word boundary by one of the six Idgham letters: Ya, Ra, Mim, Lam, Waw, or Nun, subject to the recognised exceptions taught in the curriculum.
- Letters involved
- ي · ر · م · ل · و · ن
Understand the rule
This is one of the main Noon and Tanween families. Idgham means merging. In the Noon Sakinah and Tanween family, it normally applies when Noon Sakinah or tanween at the end of one word is followed by one of the six letters in يَرْمَلُونَ (ي ر م ل و ن) at the start of the next word. The Noon sound is not pronounced separately; it merges into the following letter. This rule is normally applied across a word boundary, not automatically inside every word. In Hafs, the well-known in-word exceptions include الدُّنْيَا, بُنْيَانٌ, صِنْوَانٌ, and قِنْوَانٌ, where the Noon is pronounced clearly. These six letters divide into two subcases: with Ya, Waw, Mim, and Nun the merge keeps a nasal quality (ghunnah), while with Lam and Ra the merge has no ghunnah. The learner must first identify the Noon or tanween, then the following letter, and then learn the correct subcase with a qualified reciter. This is a rule family that is best learned step by step rather than all at once.
When does it occur?
It occurs when Noon Sakinah or Tanween at the end of one word is followed across the word boundary by one of the six Idgham letters: Ya, Ra, Mim, Lam, Waw, or Nun, subject to the recognised exceptions taught in the curriculum.
Which letters are involved?
How is it pronounced?
The sound is merged according to the relevant subcase, with voice and timing following the qualified demonstration rather than the learner's guess.
Examples
The examples below are clearly labelled teaching examples and are not from the Quran. Use them to notice the rule, then confirm your recitation with a qualified teacher.
مِنْ رَبِّكَ min rabbika (from your Lord) — Not from the Quran
مِنْ رَبِّكَ min rabbika (from your Lord) — Not from the Quran
Common Mistakes
- Undoing the merge by reading the sound too clearly.
- Applying Idgham to every Noon Sakinah case regardless of the next letter.
Connect this lesson
Izhar
Izhar is the clear pronunciation of Noon Sakinah or Tanween before one of the six throat letters: ء ه ع ح غ خ.
Open lesson: IzharIkhfa
Ikhfa is the partial concealment of Noon Sakinah or Tanween with a nasal sound when the following letter is one of the fifteen letters that are neither Izhar nor Idgham nor Iqlab letters.
Open lesson: IkhfaIqlab
Iqlab is the changing of Noon Sakinah or Tanween into a Meem sound when the following letter is Baa, pronounced with ghunnah.
Open lesson: IqlabRemember
If the rule is a merge, the sound must be identified as the next-letter trigger determines the case.
Practice
Try to identify the trigger first, say the sound slowly, then listen and repeat. Short, accurate practice is more useful than rushing through many examples.
- What distinguishes Idgham from Izhar?
- Why should learners not treat all merging patterns as the same?
Question 1 of 2
Which definition does this lesson give for Idgham?
Frequently Asked Questions
Can Idgham be recognized visually?
The visual trigger helps guide recognition, but the actual sound still needs to be heard and corrected with a qualified reciter.
Sources and review notes
What still needs review?
- This is a clear educational overview, but the exact classified subcases should be reviewed before being treated as final production content.
A reference records the source used for study; it does not mean the source author approved this lesson.
Important Note
Tajweed is best learned through both understanding and listening. Written explanations can help you understand the rules, but correct pronunciation, timing, and articulation are best learned by listening to a qualified reciter or teacher and practicing along with them.
For the best results, combine reading, listening, repetition, and guidance from a qualified Tajweed teacher.