Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hotheaded is an adjective meaning "quickly aroused to anger". It carries 2 recorded senses.
quickly aroused to anger
“a hotheaded commander”
characterized by undue haste and lack of thought or deliberation
“a hotheaded decision”
“liable to such impulsive acts as hugging strangers”
“an impetuous display of spending and gambling”
“madcap escapades”
archaism
Definitions, synonyms and semantic relations for hotheaded come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.