tranquillize (
http://definr.com/tranquillize)
v 1: make calm or still; "quiet the dragons of worry and fear"
[syn:
calm,
calm down,
quiet,
tranquilize,
tranquillise,
quieten,
lull,
still] [ant:
agitate]
2: cause to be calm or quiet; "The patient must be sedated
before the operation" [syn:
sedate,
calm,
tranquilize,
tranquillise] [ant:
stimulate]