profound in WordNet English dictionary

1. far-reaching and thoroughgoing in effect especially on the nature of something
   "the fundamental revolution in human values that has occurred"; "the book underwent fundamental changes"; "committed the fundamental error of confusing spending with extravagance"; "profound social changes"
   fundamental  profound 
   
2. (of sleep) deep and complete
   "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep"
   heavy  profound  sound  wakeless 
   
3. showing intellectual penetration or emotional depth
   "the differences are profound"; "a profound insight"; "a profound book"; "a profound mind"; "profound contempt"; "profound regret"
   profound 
   
4. situated at or extending to great depth; too deep to have been sounded or plumbed
   "the profound depths of the sea"; "the dark unfathomed caves of ocean"-Thomas Gray; "unplumbed depths of the sea"; "remote and unsounded caverns"
   profound  unfathomed  unplumbed  unsounded 
   
5. of the greatest intensity; complete
   "a profound silence"; "a state of profound shock"
   profound 
   
6. coming from deep within one
   "a profound sigh"
   profound