profound
1. Showing intellectual penetration or emotional depths; from the depths of your being
"the differences are profound"; "a profound insight"; "a profound book"; "a profound mind"; "profound contempt"; "profound regret"
2. Of the greatest intensity; complete
"a profound silence"; "a state of profound shock"
3. Far-reaching and thoroughgoing in effect especially on the nature of something
"profound social changes"
4.Coming from deep within one
"a profound sigh"
5. Situated at or extending to great depth; too deep to have been sounded or plumbed
"the profound depths of the sea"