pacify

Synonyms: allay ameliorate assuage bury the hatchet butter up calm chasten compose con conciliate cool dulcify fix up grease kiss and make up lay back lull make peace mitigate moderate mollify pacificate placate propitiate put the lid on qualify quell quiet relieve repress silence smooth over soften soft-pedal soothe square still stroke subdue sweeten take the edge off tame temper tranquilize

Antonyms: agitate incite irritate upset