assuage

(verb) cause to be more favorably inclined; gain the good will of. Synonyms: pacify, lenify, conciliate, appease, mollify, placate, gentle, gruntle. Example: "She managed to mollify the angry customer."

(verb) satisfy (thirst). Synonyms: quench, slake, allay. Example: "The cold water quenched his thirst."

(verb) provide physical relief, as from pain. Synonyms: relieve, alleviate, palliate. Example: "This pill will relieve your headaches."