Noon sakinah and tanwin: four rules

A noon sakinah (نْ) is a noon with no vowel. Tanwin (ـً ـٍ ـٌ), you saw in "I read Arabic": it is a hidden "n" at the end of a word. Both behave the same way: we study them together.

What matters is the letter that comes right after. There are four rules.

1. Izhar (إِظْهَار, "making clear"): before the six throat letters ء ه ع ح غ خ The "n" is pronounced clearly, without a lengthened ghunnah, and without a pause. • أَنْعَمْتَ (1:7): "an-'amta". • كُفُوًا أَحَدٌ (112:4): the "n" of the tanwin is heard before أَحَدٌ. • مِنْ خَوْفٍ (106:4).

2. Idgham (إِدْغَام, "merging"): before the six letters of يَرْمَلُونَ (ي ر م ل و ن) The "n" goes into the next letter, which becomes as if doubled. • With ghunnah (a nasal sound of about two counts) before ي ن م و, gathered in يَنْمُو: مِن مَّسَدٍ (111:5), "mim-masad"; حَبْلٌ مِّن (111:5). • Without ghunnah before ل and ر: مِن رَّبِّهِمْ (2:5), "mir-rabbihim"; يَكُن لَّهُ (112:4), "yakul-lahu". Idgham only happens between two words. Within one word, the "n" stays clear: الدُّنْيَا (ad-dunyaa), and three other words of the Qur'an your teacher will show you.

3. Iqlab (إِقْلَاب, "changing"): before one letter only, ب The "n" becomes a light "m", with ghunnah. The lips close gently. • مِنْ بَعْدِ: "mim-ba'di". • سَمِيعٌ بَصِيرٌ: "samii'um-baṣiir". In the mushaf, a small م above the noon or in place of the tanwin signals iqlab.

4. Ikhfa (إِخْفَاء, "hiding"): before the fifteen other letters ت ث ج د ذ ز س ش ص ض ط ظ ف ق ك The "n" is neither clear nor merged: it is hidden. The tongue does not firmly touch the palate, the sound goes through the nose (ghunnah of about two counts), and the mouth already gets ready for the next letter. • مِن شَرِّ (113:2), in Al-Falaq. • الْإِنسَانَ (103:2): within one word. • أَنتُمْ.

It adds up: 6 (izhar) + 6 (idgham) + 1 (iqlab) + 15 (ikhfa) = 28 letters.

Listen to Al-Falaq in the recitation block: مِن شَرِّ comes four times, with its ikhfa.

Challenge: take three words side by side, أَنْعَمْتَ (izhar), مِن مَّسَدٍ (idgham), مِن شَرِّ (ikhfa), and say them ten times in a row. The ear learns through contrast.

Understanding the lesson

Explanation It all comes down to the distance between the noon and the next letter. The noon is pronounced with the tip of the tongue, and its ghunnah goes through the nose. • The throat letters are very far away: the noon can neither merge nor hide, so we say it clearly (izhar). • The letters of يَرْمَلُونَ are very close, by their point of articulation or their qualities: saying both sounds one after the other would be heavy, so they merge into one (idgham). • ب is said with the lips: the noon turns into a meem, which is also said with the lips (iqlab). • The fifteen other letters are at a medium distance: we make an in-between, hidden state (ikhfa). Common mistakes: a lengthened ghunnah in izhar; a small "n" left before the idgham letter; a ghunnah before ل or ر (in the chain followed here); pressing the lips hard in iqlab; pressing the tongue against the palate in ikhfa, or making an "ng" sound.

Lessons to draw from it • Ikhfa is the most delicate rule: do not lose heart. The one who recites stumbling, with difficulty, has two rewards (Bukhari 4937, Muslim 798). • Look at the mushaf: a shadda on the next letter signals idgham, a small م signals iqlab. • Learn the four lists one by one, with an example for each.

Key points to remember • Izhar: ء ه ع ح غ خ, a clear "n". • Idgham: يَرْمَلُونَ, a merged "n"; with ghunnah before يَنْمُو, without ghunnah before ل ر; only between two words (not in الدُّنْيَا). • Iqlab: ب, the "n" becomes "m", with ghunnah. • Ikhfa: the fifteen other letters, a hidden "n", with ghunnah. • The ghunnah lasts about two counts (to be demonstrated by the teacher).

The main message Depending on the next letter, the "n" is clear, merged, changed or hidden: the Qur'an is recited as a flowing whole, passed down with a precision that leaves no sound to chance.