זָכַךְ

Job 9:30 If I wash myself with snow water, and make my hands never so clean; Job 15:15 Behold, he putteth no trust in his saints; yea, the heavens are not clean in his sight. Job 25:5 Behold even to the moon, and it shineth not; yea, the stars are not pure in his sight. Lamentations 4:7 Her Nazarites were purer than snow, they were whiter than milk, they were more ruddy in body than rubies, their polishing was of sapphire: