tranquillize

Verb	1.	tranquillize - make calm or still; "quiet the dragons of worry and fear" Synonyms: calm, still, tranquilize, tranquillise, calm down, quiet, quieten, lull
	2.	tranquillize - cause to be calm or quiet as by administering a sedative to; "The patient must be sedated before the operation" Synonyms: sedate, tranquilize, tranquillise, calm

appease, assuage, assure, calm, calm down, comfort, compose, conciliate, console, gentle, gruntle, lenify, lull, mollify, pacify, placate, quiet, quieten, reassure, solace, soothe, still, tranquilize, tranquillise