Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
expiatory is an adjective meaning "having power to atone for or offered by way of expiation or propitiation". It carries one recorded sense.
having power to atone for or offered by way of expiation or propitiation
“expiatory (or propitiatory) sacrifice”
Definitions, synonyms and semantic relations for expiatory come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.