keep one's pants on
tranquillise
tranquillize
quieten
calm down
lull
quiet
still
tranquilize
calm
level
undisturbed
lown
calmative
stilly
keep one's knickers on
calmness
keep a cool head
calmish
self-possession
equanimous
take a breath
keep one's hair on
tranquillizingly
unflustered
reposed
unpanicked
encalm
chill
pacific
calmy
keep one's head
keep one's shirt on
calm your farm
have one's wits about one
ice-calm
chillax
unruffle
relax
calmly
slow one's roll
undisturbedly
let go
hold one's nerve
get ahold of oneself
salve
windlessness
stillness
compose
silent