We know idghaam is divided into two categories one with a ghunna (letters ya.nun meem wow)and then 2 with out a ghunna... (letters ra and laam), then again is idghham further divided in to 2 groups idghaam naaqis and idghaam kaamil ?

Question
Assalaamu 'alaykum,

I wanted to ask about idghaam .. we know idghaam is divided into two categories 1 with a gunna (letters ya.nun meem wow)and then 2 with out a gunna..( letters ra laam ) then again is idghham further divided in to 2 groups idghaam naaqis and idghaam kaamil ?

Answer

Wa Alaikum Assalam Wa Rahmatullahi Wa Barakatuh,
Yes it is correct that idghaam is divided in two categories: 1. Idghaam with ghunnah which have the letters () and 2. Idghaam without ghunnah (, and ).
  ( idghaam kaamil) and (idghaam naaqis)  refer to the complete or incomplete merging o f the saakin letter into the letter causing the idghaam.  In the case of the noon saakinah and tanween, these terms are applied when the noon saakinah or tanween merge into one of the letters in the group  .  This should not be confused or linked with  idghaam with a ghunnah or without a ghunnah.
  (complete merging) is if the noon saakinah or tanween completely merges into the next letter without any trace of the left. This is why it is called "kaamil" in Arabic,  meaning complete merging.  This is found when the noon saakinah or tanween merges with the letters , , , and .

(incomplete merging)  is when the noon saakinah or tanween merges into the next letter, however the ghunnah from the noon saakinah or tanween remains. This is why it is called "naaqis" in Arabic, meaning incomplete merging. The incomplete merging in the noon saakinah and tanween is when they merge into the letters or .

This indication for    (complete merging) in the Medinah Complex printing of the mushaf can be found by the shaddah over the letter being merged into.  If the letter of idghaam which follows the noon sakinaah or tanween has a shaddah then the idghaam will be complete.
In the (incomplete merging) there is no shaddah. 

NOTE: This indicator though does not work with the Indo-Pakistani prints of the copy of the Qur'an, for there is a shaddah found on the and when the noon saakinah or tanween merges into them, even though the merging is incomplete-

Please also see: http://www.abouttajweed.com/the-noon-saakinah-and-tanween/merging-of-the-noon-saakinah-and-tanween-p-2.html



Wassalam Alaikum Wa Rahmatullah