חָשַׂךְ châsak (H2820)

to restrain or (reflex.) refrain; by implication, to refuse, spare, preserve; to observe

1) to withhold, restrain, hold back, keep in check, refrain 1a) (Qal) 1a1) to withhold, keep back, keep for oneself, keep from, hold in check, refrain, spare, reserve 1a2) to restrain, check 1b) (Niphal) to assuage, be spared

a primitive root; also interchangeable with חָשַׁךְ (H2821)