profound

Adjective
  1. Showing intellectual penetration or emotional depth (synset 301878713)
    "the differences are profound"; "a profound insight"; "a profound book"; "a profound mind"; "profound contempt"; "profound regret"
    also:
    • intense - possessing or displaying a distinctive feature to a heightened degree
    • scholarly - characteristic of scholars or scholarship
    similar to:
    • deep - marked by depth of thinking
    • thoughtful - having intellectual depth
  2. Of the greatest intensity;
    Complete (synset 301516542)
    "a profound silence"; "a state of profound shock"
    similar to: intense - possessing or displaying a distinctive feature to a heightened degree
  3. Far-reaching and thoroughgoing in effect especially on the nature of something (synset 302170349)
    "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"
    similar to: important, significant - important in effect or meaning
    same as: fundamental
  4. Coming from deep within one (synset 300696686)
    "a profound sigh"
    similar to: deep - relatively deep or strong; affecting one deeply
  5. (of sleep) deep and complete (synset 300696469)
    "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep"
    similar to: deep - relatively deep or strong; affecting one deeply
    same as: heavy, sound, wakeless
  6. Situated at or extending to great depth;
    Too deep to have been sounded or plumbed (synset 300694418)
    "the profound depths of the sea"; "the dark unfathomed caves of ocean"; "unplumbed depths of the sea"; "remote and unsounded caverns"
    similar to: deep - having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination
    same as: unfathomed, unplumbed, unsounded

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