profound

adjective

1. showing intellectual penetration or emotional depth"the differences are profound"
2. of the greatest intensity; complete"a profound silence"
3. far-reaching and thoroughgoing in effect especially on the nature of something"the fundamental revolution in human values that has occurred"
4. coming from deep within one"a profound sigh"
5. (of sleep) deep and complete"a heavy sleep"
6. situated at or extending to great depth; too deep to have been sounded or plumbed"the profound depths of the sea"