Strong's #2141: zakak (pronounced zaw-kak')

a primitive root (compare 2135); to be transparent or clean (phys. or morally):--be (make) clean, be pure(-r).

Brown-Driver-Briggs Hebrew Lexicon:

zâkak

1) to be pure, be bright, be clean, be bright, clean

1a) (Qal)

1a1) to be bright, be shining

1a2) to be clean, be pure

1b) (Hiphil) to cleanse, make cleanse, make clean

Part of Speech: verb

Relation: a primitive root [compare H2135]

Usage:

This word is used 4 times:

 

Job 9:30: "water, and make my hands never so clean;"
Job 15:15: "he putteth no trust in his saints; yea, the heavens are not clean"
Job 25:5: "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"