expiatory

Adjective

ex=pi=a=to=ry

WORDNET DICTIONARY

expiatory(a = adj.pert) expiative, propitiatory - having power to atone for or offered by way of expiation or propitiation; "expiatory (or propitiatory) sacrifice"

Derived form verb expiate₁

expiatory, a. [L. expiatorius: cf. F. expiatoire.].

Having power, or intended, to make expiation; atoning; as, an expiatory sacrifice. [1913 Webster]