Lesson 5: Iqlaab — Conversion (إقلاب)

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Lesson 5: Iqlaab — Conversion (إقلاب)

Unit 5 · Lesson 5 · Iqlaab — Imam Quran Academy

Did You Know?

Iqlaab has only one letter — but it changes the noon completely

You have now learned three of the four noon saakin rules. Today you learn Iqlaab (إقلاب) — which means "substitution" or "flipping." It is the rarest rule: only one letter triggers it. But when it does, something remarkable happens — the noon does not just hide or merge, it transforms entirely into a meem (م), held in the nose for 2 counts.

That one letter is Ba (ب). Whenever a noon saakin or tanwin is followed by Ba, you read a soft meem with ghunnah — not a noon at all. Even in the written Quran, some mushafs mark this with a small meem (م) above the noon as a reminder.

Ith-har إظهار 6 letters · clear

Idghaam إدغام 6 letters · merge

Ikhfaa إخفاء 15 letters · conceal

Iqlaab ← here إقلاب 1 letter only · ب

What Iqlaab does — step by step

Noon Saakin نْ the trigger letter

Ba follows it ب the only Iqlaab letter

→

Noon becomes Meem مْ held 2 counts · nasal hum

مِنۢ بَعْدِ Written: مِن بَعْدِ — but read as: "mim-baʿdi" — the noon is replaced by a soft meem with ghunnah before the Ba

Unit 5 · Lesson 5

The One Iqlaab Letter

Only Ba (ب) triggers Iqlaab — making this the easiest rule to identify. If the letter after noon saakin or tanwin is Ba, the answer is always Iqlaab.

The Only Iqlaab Letter ب Bā The letter Ba

When noon saakin or tanwin
is followed by ب
→ noon becomes meem + ghunnah

tap to hear

What makes Iqlaab unique

Only one letter triggers it — easier to identify than any other rule.

The noon transforms into meem — not hidden, not merged, but replaced.

Ghunnah is always present — the nasal hum is held 2 counts, just like Idghaam bighunnah and Ikhfaa.

The mushaf sometimes marks it — a small م is written above the noon to remind the reader.

Works the same with tanwin — كِتَابٌ بَيِّنٌ → the tanwin noon also becomes meem before Ba.

Important — Tanwin

Iqlaab Also Applies to Tanwin — All Three Forms

Iqlaab is triggered by two things — not one. Both the noon saakin and all three forms of tanwin become meem before Ba.

What is Tanwin?

Tanwin is a double vowel ending found on many Arabic nouns and adjectives. It sounds like a final noon — but it is not written as a letter, only as a diacritic mark. It comes in three forms matching the three short vowels. Whenever any of these three tanwin marks is followed by Ba (ب), the noon sound becomes a meem with ghunnah — exactly like noon saakin.

Tanwin Fath — فَتْحَتَان ـً double fatha · sounds like "-an"

Written

كِتَابًا بَيِّنًا written

↓

كِتَابَمْ بَيِّنًا read as

tanwin ً before ب → noon becomes meem

Tanwin Kasr — كَسْرَتَان ـٍ double kasra · sounds like "-in"

Written

مِن شَرِّ غَاسِقٍ بِذَاتِ written

↓

غَاسِقِمْ بِذَاتِ read as

Al-Falaq 113:3 — tanwin ٍ before ب → meem

Tanwin Damm — ضَمَّتَان ـٌ double damma · sounds like "-un"

Written

عَلِيمٌ بِذَاتِ الصُّدُورِ written

↓

عَلِيمُمْ بِذَاتِ read as

Al-Imran 3:119 — tanwin ٌ before ب → meem

Noon Saakin + ب مِنۢ بَعْدِ نْ → مْ + ghunnah

Tanwin Fath ً + ب خَيْرًاۢ بَيِّنًا ً → مْ + ghunnah

Tanwin Kasr ٍ + ب غَاسِقٍۢ بِذَاتِ ٍ → مْ + ghunnah

Tanwin Damm ٌ + ب عَلِيمٌۢ بِكُلِّ ٌ → مْ + ghunnah

Recognition

Iqlaab Examples — Before & After

Study how the noon changes to meem in each example. The written form and the read form are different — that is the heart of Iqlaab.

Written	How to Read	Source	What Changes
مِن بَعْدِ	mim-baʿdi	مِنۢ بَعْدِ مِيثَاقِهِ Al-Baqarah 2:27 — "after His covenant"	نْ → مْ + ghunnah 2 counts
مِن بَيْنِ	mim-bayni	مِنۢ بَيْنِ يَدَيْهِ Al-Baqarah 2:255 (Ayat al-Kursi) — "between His hands"	نْ → مْ + ghunnah 2 counts
أَنۢبِئْهُم	ambiʾhum	أَنۢبِئْهُم بِأَسْمَائِهِمْ Al-Baqarah 2:33 — "inform them of their names"	نْ inside word → مْ + ghunnah
شَيْءٍ بَعِيدٍ	shayʾim-baʿīd	بِشَيْءٍۭ بَعِيدٍ Al-Shura 42:22 — "with something far"	tanwin ٍ → مْ + ghunnah
عَلِيمٌ بِذَاتِ	ʿalīmum-bidhāt	عَلِيمٌۭ بِذَاتِ الصُّدُورِ Al-Imran 3:119 — "Knowing of what is in the hearts"	tanwin ٌ → مْ + ghunnah

Live Quran Examples

Spot Iqlaab in the Quran

The blue shows what is written. The green shows what is actually read — the noon becomes meem.

مِن بَعْدِ مِيثَاقِهِ

مِن بَعْدِ — written noon · read as meem — مِمْ بَعْدِ

مِن بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِ

مِن بَيْنِ — noon saakin before ب → Iqlaab → read as meem with ghunnah

أَنۢبِئْهُم بِأَسْمَائِهِمْ

أَنۢبِئْ — noon saakin inside one word before ب → Iqlaab applies even within a single word

إِنَّهُ عَلِيمٌۭ بِذَاتِ الصُّدُورِ

عَلِيمٌ بِذَاتِ — tanwin (ٌ) before ب → Iqlaab → read عَلِيمُمْ بِذَاتِ

وَإِيَّاكَ نَسْتَعِينُ ۞ اهْدِنَا الصِّرَاطَ الْمُسْتَقِيمَ

Review Al-Fatiha — no Iqlaab here, but can you spot which rule applies to each noon saakin in the surah?

Comprehensive Review Quiz — Unit 5

All Four Rules — Can You Tell Them Apart?

12 questions covering all four noon saakin rules — Ith-har, Idghaam, Ikhfaa, and Iqlaab. Iqlaab questions appear first, then mixed review. At the end you will see your score per rule.

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Quiz Complete!

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