How do you pronounce the idhar?

Question
How do you pronounce the idhar?

Answer
The word idh-har , means clear.  When applying the tajweed rule, we read the letter clearly from it articulation point, with no extra ghunnah on the letter we are making clear. 

Please see the following lesson for more details:
http://www.abouttajweed.com/the-noon-saakinah-and-tanween/the-making-clear-of-the-noon-saakinah-and-ta.html