expiator


ex·pi·ate

E0287200 (ĕk′spē-āt′)v. ex·pi·at·ed, ex·pi·at·ing, ex·pi·ates v.tr. To make amends or reparation for; atone for: expiate one's sins by acts of penance.v.intr. To make amends; atone.
[Latin expiāre, expiāt- : ex-, intensive pref.; see ex- + piāre, to atone (from pius, devout).]
ex′pi·a′tor n.