keep one's head
keep one's head above water
keep one's mouth shut
keep one's promise
keep one's shirt on
keep oneself to oneself
keep out
keep out of
keep pace with
keep quiet
keep secret
keep silent
keep still
keep the peace
keep to
keep to the left
keep track of
keep up
keep vigil
keep watch and ward
keep watch over
keeper
keepsake
kefir
keg