PROFOUND
profound, unfathomed, unplumbed, unsounded
(adjective) 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”
heavy, profound, sound, wakeless
(adjective) (of sleep) deep and complete; “a heavy sleep”; “fell into a profound sleep”; “a sound sleeper”; “deep wakeless sleep”
profound
(adjective) coming from deep within one; “a profound sigh”
profound
(adjective) of the greatest intensity; complete; “a profound silence”; “a state of profound shock”
profound
(adjective) showing intellectual penetration or emotional depth; “the differences are profound”; “a profound insight”; “a profound book”; “a profound mind”; “profound contempt”; “profound regret”
fundamental, profound
(adjective) 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”
Source: WordNet® 3.1
Etymology
Adjective
profound (comparative more profound, superlative most profound)
Descending far below the surface; opening or reaching to great depth; deep.
Very deep; very serious
Intellectually deep; entering far into subjects; reaching to the bottom of a matter, or of a branch of learning; thorough
Characterized by intensity; deeply felt; pervading
Bending low, exhibiting or expressing deep humility; lowly; submissive
Noun
profound (uncountable)
(obsolete) The deep; the sea; the ocean.
(obsolete) An abyss.
Verb
profound (third-person singular simple present profounds, present participle profounding, simple past and past participle profounded)
(obsolete) To cause to sink deeply; to cause to dive or penetrate far down.
(obsolete) To dive deeply; to penetrate.
Source: Wiktionary
Pro*found", a. Etym: [F. profond, L. profundus; pro before, forward +
fundus the bottom. See Found to establish, Bottom lowest part.]
1. Descending far below the surface; opening or reaching to a great
depth; deep. "A gulf profound." Milton.
2. Intellectually deep; entering far into subjects; reaching to the
bottom of a matter, or of a branch of learning; thorough; as, a
profound investigation or treatise; a profound scholar; profound
wisdom.
3. Characterized by intensity; deeply felt; pervading; overmastering;
far-reaching; strongly impressed; as, a profound sleep. "Profound
sciatica." Shak.
Of the profound corruption of this class there can be no doubt.
Milman.
4. Bending low, exhibiting or expressing deep humility; lowly;
submissive; as, a profound bow.
What humble gestures! What profound reverence! Dupp
Pro*found", n.
1. The deep; the sea; the ocean.
God in the fathomless profound Hath all this choice commanders
drowned. Sandys.
2. An abyss. Milton.
Pro*found", v. t.
Definition: To cause to sink deeply; to cause to dive or penetrate far
down. [Obs.] Sir T. Browne.
Pro*found", v. i.
Definition: To dive deeply; to penetrate. [Obs.]
Source: Webster’s Unabridged Dictionary 1913 Edition