Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
worthlessness is a noun meaning "having no qualities that would render it valuable or useful". It carries 2 recorded senses.
having no qualities that would render it valuable or useful
“the drill sergeant's intent was to convince all the recruits of their worthlessness”
the quality of being without practical use
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 worthlessness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.