The adjective conciliatory means someone who is willing to end a disagreement or trying to make someone less angry.

Synonyms are appeasing, assuaging, calm, or civil.

The word origins in 1570s. It comes from conciliate meaning “to end a disagreement or someone’s anger in a friendly way” plus -ory.

Despite the conciliatory policy, Clement angered Henry VI.

The main object of the president is to secure settlement by conciliatory methods.

He sent a conciliatory gift to his friend after they argued.