suffocate, choke - suppress the development, creativity, or imagination of; "His job suffocated him"

conquer, inhibit, stamp down, suppress, subdue, curb - to put down by force or authority; "suppress a nascent uprising"; "stamp down on littering"; "conquer one's desires"

wet - cause to become wet; "Wet your face"

humidify, moisturise, moisturize - make (more) humid; "We have a machine that humidifies the air in the house"

baste - cover with liquid before cooking; "baste a roast"

soften - make (images or sounds) soft or softer

weaken - lessen the strength of; "The fever weakened his body"

soften, damp, weaken, dampen, break - lessen in force or effect; "soften a shock"; "break a fall"

retard, delay, check - slow the growth or development of; "The brain damage will retard the child's language development"

blunt, deaden - make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation; "Terror blunted her feelings"; "deaden a sound"

deafen - make soundproof; "deafen a room"

deaden, damp, dampen - make vague or obscure or make (an image) less visible; "muffle the message"