verb (used with object), ex·pi·at·ed, ex·pi·at·ing.
to atone for; make amends or reparation for: to expiate one's crimes.
Origin: 1585–95; Related forms
< Latin expiātus
(past participle of expiāre
to atone for, make good), equivalent to ex- ex-1
) to propitiate (see pious
) + -tus
past participle suffix