Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
profoundness is a noun meaning "extremeness of degree". It carries 5 recorded senses.
wisdom that is recondite and abstruse and profound
“the anthropologist was impressed by the reconditeness of the native proverbs”
the intellectual ability to penetrate deeply into ideas
the quality of being physically deep
“the profundity of the mine was almost a mile”
intellectual depth; penetrating knowledge; keen insight; etc
“the depth of my feeling”
“the profoundness of the silence”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for profoundness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.