Ghunna - Nasalistaion
The quality of ghunna is present in the letters م and ن. So whenever we pronounce these letters the sound will go into the nose which is known as ghunna.
Whenever the letter م or ن has a shadda we pronounce the letter with a strong ghunna. This means we will hold the sound in our nose for 2 counts.
Try pronouncing the examples below with strong ghunna.