mollify

Synonyms: abate allay alleviate ameliorate appease assuage blunt calm compose conciliate cool cushion decrease diminish dulcify ease fix up lessen lighten lull mellow mitigate moderate modify pacify patch things up placate propitiate quell quiet reduce relieve soften sweeten take sting out temper tranquilize

Antonyms: agitate depress exasperate harass incite provoke trouble upset worry