זָכָה zâkâh (H2135)

to be translucent; figuratively, to be innocent

1) to be clean, be pure, be clear 1a) (Qal) 1a1) to be clean, be pure 1a2) to be clear, be justified 1b) (Piel) 1b1) to make clean, make pure, keep clean, keep pure 1c) (Hithpael) 1c1) to cleanse 1c2) to make yourself clean, purify oneself

a primitive root (compare זָכַךְ (H2141));