profundity

plural profundities

1. countableuncountableThe state of being profound; magnitude, gravity, or intensity.

   The situation's profundity escaped most observers.

   Synonyms: profoundness · Antonyms: shallowness, triviality

2. countableuncountableDeep intellect or insight.

   Near-synonyms: brilliance, genius

   2 more examples

   Unfortunately, Andrew's colossal ego means people miss his profundity.

   Also, he had legs which seemed to begin almost at his chest—or, rather, at his chin! Yet, for all his air of peacock-like conceit, his clothes sagged a little, and his face wore a sheepish air which might have passed for profundity.

   1867, Fyodor Dostoyevsky, chapter VI, in The Gambler, translated by C. J. Hogarth^(https://en.wikisource.org/wiki/The_Gambler_(1867)/VI)

   Synonyms: profoundness, brilliance, genius · Antonyms: stupidity

3. countableuncommonuncountableA great depth; a deep place.

   Near-synonym: abyss

   1 more example

   I delved the abyssal profundities of Neptune's realm.

   Synonyms: abyss · Antonyms: shoal, shallow

4. archaiccountableuncountableDepth; the state of possessing great downwards extent.

   1 more example

   [A] sharp-looking old dame, […] inhabited a "laigh [low] shop," anglicé [in English], a cellar, opening to the High-street by a strait and steep stair, at the bottom of which she sold tape, thread, needles, skeans of worsted, coarse linen cloth, and such feminine gear, to those who had the courage and skill to descend to the profundity of her dwelling, without falling headlong themselves, or throwing down any of the numerous articles which, piled on each side of the descent, indicated the profession of the trader below.

   1816, [Walter Scott], chapter I, in The Antiquary. […], volume I, Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co.; London: Longman, Hurst, Rees, Orme, and Brown, →OCLC, page 4

   Synonyms: deepness