Final answer:
Idgham Kaamil is a concept in Tajweed referring to the complete merging of certain Arabic letters during the recitation of the Qur'an, specifically when a nasal sound precedes specific letters, fully blending the first letter into the subsequent one.
Step-by-step explanation:
Idgham Kaamil is a term from Tajweed, the art of the recitation of the Qur'an. It refers to the complete assimilation of one letter into the next, resulting in the first letter not being pronounced separately but blended into the subsequent letter. This only occurs when certain letters follow one another, specifically, when a nasal sound (ن nun or م mim) is followed by one of the letters from the Arabic phrase يرملون (ي ya, ر ra, م mim, ل lam, و waw, ن nun). It is an important aspect of Kaamil, which means 'complete', indicating that the idgham is fully applied.