Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
equanimous is an adjective meaning "in full control of your faculties". It carries one recorded sense.
in full control of your faculties
“the witness remained collected throughout the cross-examination”
“perfectly poised and sure of himself”
“more self-contained and more dependable than many of the early frontiersmen”
“strong and self-possessed in the face of trouble”
Definitions, synonyms and semantic relations for equanimous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.