v. ex·pi·at·ed, ex·pi·at·ing, ex·pi·ates
To make amends or reparation for; atone for: expiate one's sins by acts of penance.
To make amends; atone.
[Latin expiāre, expiāt- : ex-, intensive pref.; see EX- + piāre, to atone (from pius, devout).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.