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