"propitiatory" in the adjective sense
1. expiatory, expiative, propitiatory
having power to atone for or offered by way of expiation or propitiation
"expiatory (or propitiatory) sacrifice"
2. propitiative, propitiatory
intended to reconcile or appease
"sent flowers as a propitiatory gesture"
Source: WordNet® (An amazing lexical database of English)
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