The most common error is rushing through the Ghunnah. Remember to give it a full two counts .
Beyond the individual letters of Noon and Meem, Ghunnah is a critical component of several Tajweed rules. These rules dictate how sounds blend or hide depending on the letters that follow them. Idgham Ma’al Ghunnah (Merging with Ghunnah) ghunnah letters
Not all Ghunnahs are equal in length or strength. According to Tajweed scholars at sites like Quranic, there are four distinct levels of intensity: The most common error is rushing through the Ghunnah
Found in Noon and Meem when they have a Sukoon (vowelless) but are not merged. These rules dictate how sounds blend or hide
There is that inherently carries a permanent Ghunnah when it has a shaddah (ّ):
(غنّة) is a nasal sound emitted from the nose. Its duration is 2 counts (harakah).
While the Ghunnah should be clear, holding it for three or four counts can disrupt the rhythm of the verse. Conclusion