Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
high-handedly is an adverb meaning "in a domineering high-handed manner". It carries one recorded sense.
in a domineering high-handed manner
“he behaved high-handedly toward his employees”
Definitions, synonyms and semantic relations for high-handedly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.