The initial idioms of the letter K

keep a close watch on	keep a cool head
keep a firm grip on	keep a lid on
keep a secret	keep an eye out for
keep a sharp lookout (for something or someone)	keep a stiff upper lip
keep a straight face	Keep a thing seven years and you'll find a use
keep a weather eye on	keep a weather eye out
keep about	keep abreast of
keep an act up	keep after
keep ahead	keep an/ ear to the ground
keep an ear out for	keep an ear to the ground
keep an eye out	keep an eye peeled (for something or someone)
keep an open mind	keep apart
keep at a distance	keep at arm's length
keep at bay	Keep at it!
keep at	keep away