How should we read the word farrattum in sra yusuf ayat 80? jazak allah khair!
Answer
We read the idhgaam of the
into the 
in the word 
as an incomplete merging in which some of the characteristics of the remain. We close on the articulation point with the characteristics of the and then open the articulation point with the characteristics of the . You can hear the same type of idghaam, but in a different aayah:
http://www.abouttajweed.com/ahattu_128.mp3For more information, please see the following link: http://www.abouttajweed.com/al-mutamathilayn_al-mutajaanisayn_4.htm
Wa iyyaakum.