pro·found 
(prə-found, prō-)
(prə-found, prō-)adj. pro·found·er, pro·found·est
1. Having, showing, or requiring great insight or understanding: a profound thinker; a profound analysis.
2. Deeply felt or held; intense: profound contempt; a profound conviction.
3. Thoroughgoing; far-reaching: profound social changes.
4. Unqualified or unbroken: a profound silence; profound sleep.
5. Situated at, extending to, or coming from a great depth; deep: a profound chasm.
[Middle English profounde, from Old French profond, deep, from Latin profundus : prō-, before; see PRO-1 + fundus, bottom.]
pro·foundly adv.
pro·foundness n.