Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
undeferential is an adjective meaning "not showing courteous respect". It carries one recorded sense.
not showing courteous respect
Definitions, synonyms and semantic relations for undeferential come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.