expiate

Etymology

From Latin expiātus, past participle of expiō (“atone for”).

verb

1. (transitive, intransitive) To atone or make reparation for.
   Thus those pious souls who expiate the remainder of their sins amidst such tortures will receive a special and opportune consolation, […] 1888, Leo XIII, Quod Anniversarius
   The first change of regime came with the release of my more difficult mathematical, empirical, and scholarly work in a dozen articles in a variety of journals in an attempt to expiate my crime of having sold too many books. 2010, Nassim Nicholas Taleb, The Black Swan: The Impact of the Highly Improbable, New York: Random House, page 335
2. (transitive) To make amends or pay the penalty for.
   He had only to live and expiate in solitude the crimes which he had committed. 1876, Jules Verne, translated by Stephen W. White, The Mysterious Island, part 2, chapter 17
   And when it was required of him by the rigid laws of a haphazard justice, which in retrospect seems like every night of the week, he pressed his limp forelock into a filthy washbasin, clutched a tap in each throbbing hand, and expiated a string of crimes he didn't know he had committed until they were thoughtfully explained to him between each stroke by Mr. Willow or his representatives. 1986, John le Carré, A Perfect Spy
3. (transitive, obsolete) To relieve or cleanse of guilt.
   […] and Epimenides was brought from Crete to expiate the city. 1829, Pierre Henri Larcher, Larcher's Notes on Herodotus, volume 2, page 195
4. (transitive) To purify with sacred rites.
5. (transitive) To wind up, bring to an end.