profound profound /proʊˈfaʊnd/

adjective

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