pacify

To ease the anger or agitation of (a person or the mind, for example).

To calm or soothe (a feeling, such as anger).

To end war, fighting, or violence in (a region or country), especially by military force.

To subdue or quell (an insurrection or conflict, for example).

To cause (a group) to end a rebellion or other violent action.

To appease; calm; quiet; allay the agitation or excitement of: as, to pacify a man when angry.

To restore peace to; tranquilize: as, to pacify countries in contention.

Synonyms To conciliate, assuage, still, lull, smooth, compose, soothe, mollify.