propitiatory
From Longman Dictionary of Contemporary Englishpropitiatorypro‧pi‧ti‧a‧to‧ry /prəˈpɪʃiətəri $ -tɔːri/ adjective formal FRIENDLYintended to please someone and make them feel less angry and more friendly a propitiatory gift of flowersExamples from the Corpuspropitiatory• Perhaps he knows, as I do, that the letters are propitiatory.• We saw earlier the strong propitiatory element in the religion of the Germanic pagans with whom St Boniface dealt in the 720s.