Izhar Halqi: Pronouncing nun sakinah or tanween clearly without ghunnah when followed by one of the six throat letters.
The six letters (deepest to nearest throat):
ء، ه (deepest) — ع، ح (middle) — غ، خ (nearest)
Mnemonic: "Akhi haaka 'ilman hazahu ghayru khasir"
Complete Qur'anic examples (with sakinah noon and tanween for each):
- ء: مَنْ آمَنَ (BQ 62) | رَسُولٌ أَمِينٌ (Sh 107)
- ه: يَنْهَوْنَ (Ar 157) | جُرُفٍ هَارٍ (Tw 109)
- ع: أَنْعَمْتَ (FA 7) | سَمِيعٌ عَلِيمٌ (BQ 137)
- ح: وَانْحَرْ (KW 2) | عَلِيمٌ حَكِيمٌ (BQ 32)
- غ: فَسَيُنْغِضُونَ (Is 51) | عَفُوًّا غَفُورًا (NS 43)
- خ: وَالْمُنْخَنِقَةُ (MA 3) | يَوْمَئِذٍ خَاشِعَةٌ (GH 2)
Why Izhar? The makhraj of noon (tongue tip) is far from the throat, so neither merging nor hiding is possible.
Question: Why is the ruling Izhar (not Idgham or Ikhfa) for nun sakinah before the six throat letters?
Answer: Because the noon's makhraj (tongue tip) is far from the throat. Idgham requires close makharij; Ikhfa is between. When distant, only Izhar applies