How To Pronounce The French Word For Fifteen quinze?

kɛ̃z

Here's a breakdown:

* k like the "k" in "kite"

* ɛ̃ like the "en" in "pen" but with a nasal sound, similar to the "n" in "French"

* z like the "z" in "zoo"

So, it sounds like "kenz" with a nasal "n".