Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cantankerously is an adverb meaning "in a bad mood". It carries one recorded sense.
in a bad mood
“he answered her cantankerously”
Definitions, synonyms and semantic relations for cantankerously come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.