Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
characterless is an adjective meaning "lacking distinct or individual characteristics; dull and uninteresting". It carries one recorded sense.
lacking distinct or individual characteristics; dull and uninteresting
“women dressed in nondescript clothes”
“a nondescript novel”
Definitions, synonyms and semantic relations for characterless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.