Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
gaucheness is a noun meaning "an impolite manner that is vulgar and lacking tact or refinement". It carries one recorded sense.
an impolite manner that is vulgar and lacking tact or refinement
“the whole town was famous for its crudeness”
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 gaucheness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.