From Wiktionary, the free dictionary
expiative (comparative more expiative, superlative most expiative)
- That serves to expiate.
2012, W. W. Meissner, Ethical Dimension of Psychoanalysis, The: A Dialogue[1]:Studies on behavioral aspects of altruism connect it with guilt, resulting in either expiative or reparative consequences (Krebs 1970).