Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tyrannous is an adjective meaning "marked by unjust severity or arbitrary behavior". It carries one recorded sense.
marked by unjust severity or arbitrary behavior
“the oppressive government”
“oppressive laws”
“a tyrannical parent”
“tyrannous disregard of human rights”
Definitions, synonyms and semantic relations for tyrannous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.