Sir you still dint get it right ... 
It is a French language word, which means "meeting/ encounter" ..
In French, "R" is pronounced mostly "gh as in ghaafil" and rarely as "kh as in Khanpur" ...
"s" is NEVER pronounced at the end of a word ..
Hence, the correct pronunciation is like "ghaandeyvoon" ... and it is certainly not pronounced the way Bro Saad Istifa wants it to be pronounced.
The "n" at the end of the word is "noon-ghunna" and not "noon" 