זָכַךְzâkak

be bright, clean, pure

Pronunciation: zaw-kak' · Hebrew/Aramaic (Old Testament) · H2141

Meanings

Qal

1. be right, shining (Lamentations 4:7)

2. be clean, pure (Job 15:15; Job 25:5; Job 15:14)

Hiph`il: cleanse (Job 9:30)

Same root

זָכָהzâkâh · H2135to be translucent; figuratively, to be innocent
זַךְzak · H2134clear
זַכַּיZakkay · H2140Zakkai, an Israelite

Where it appears

Appears 4 times in the Bible.

Job 9:30 Even if I were to wash myself with soap and clean my hands with lye,
Job 15:15 Look, God does not even trust the angels. Even the heavens are not absolutely pure in his sight.
Job 25:5 God is more glorious than the moon; he shines brighter than the stars.
Lamentations 4:7 Our princes once glowed with health— brighter than snow, whiter than milk. Their faces were as ruddy as rubies, their appearance like fine jewels.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).