bright, furbish, scour

Concise Bible Dictionary:

“To polish, make smooth,” applied to weapons as a preparation for war (Jer. 46:4; Ezek. 21:9, 11, 28).
 
Polished Fireman’s Helmet

Strong’s Dictionary of Hebrew Words:

Number:
4838 (find all occurrences in KJV Bible)
Transliteration:
maraq
Phonic:
maw-rak’
Meaning:
a primitive root; to polish; by implication, to sharpen; also to rinse
KJV Usage:
bright, furbish, scour