Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
poorness is a noun meaning "the state of having little or no money and few or no material possessions". It carries 4 recorded senses.
the state of having little or no money and few or no material possessions
the quality of being meager
“an exiguity of cloth that would only allow of miniature capes”
the quality of being poorly made or maintained
“she was unrecognizable because of the poorness of the photography”
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 poorness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.