degrade, lower, demote, devalue, cause to decline

knee, to be spent, to be depressed, diminished

knees

get head or beard clean shaved

polish, glaze (paper), press, pound, grind, mix, repeat over and again, shave, throttle, choke

trousers reaching down to knees,bermuda shorts, tight pyjamas

gulp, drink a mouthful

mix well or thoroughly, grind, pulverize medicine, to dissolve

derogate, relegate

degrade, demote

declining of prices

increase and decrease, rise and fall

knee lay-down on the ground, Metaphorically: accept defeat, submit to a superior force or stronger person