what is the meaning of ihkfa?

Question
what is the meaning of ihkfa?

Answer
Linguistically, ikhfa' means to hide.  In applied tajweed it is defined as: The pronunciation of a non-voweled letter stripped of any shaddah, characterized somewhere between an and an  with a ghunnah remaining on the first letter, in this case the  saakinah and the tanween.

To read further about the ikhfa' of the saakinah and tanween, please see:
http://www.abouttajweed.com/the-noon-saakinah-and-tanween/hiding-ikhfa-rule-of-the-noon-saakinah-and-ta.html