steam, vapour

boiler

steam engine

be extremely secretive, not to divulge a secret by word or gesture

steamroller, a heavy, slow-moving vehicle with a roller, used to flatten the surfaces of roads during construction

(steam or vapour) to emit

(of a bird) feed its young with its bill

guess

steam bath

foment with steam

change water into steam

make a mountain out of a molehill

keep quiet, not to make the slightest noise

live Steam