The letters for ghunnah, which refers to a nasal sound in Arabic phonetics, are ن (noon) and م (meem). When these letters appear in specific contexts, such as in certain words or when they are followed by certain other letters, they produce the nasal sound characteristic of ghunnah. This sound is an important aspect of proper pronunciation in Tajweed, the art of reciting the Quran.
what is izhaar ? if after noon saakien or tanween there appears any of the hurafe- khulqi letters then this is called izhaar note= when pronounce a word which is izhaar you don't make ghunnah. Example= منهم منعلم عذب الﲕم ان امن
Ghunnah Neki jin ka Quran main be Zikar hay.