Strong's #6352: pecham (pronounced peh-khawm')

perhaps from an unused root probably meaning to be black; a coal, whether charred or live:--coals.

Brown-Driver-Briggs Hebrew Lexicon:

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pechâm

1) coal, charcoal, ember

Part of Speech: noun masculine

Relation: perhaps from an unused root probably meaning to be black

Usage:

This word is used 3 times:

 

Proverbs 26:21: " As coals are to burning coals, and wood to fire; so is a contentious man to kindle strife."
Isaiah 44:12: "The blacksmith with the tongs both worketh in the coals, and fashioneth it with hammers, and worketh"
Isaiah 54:16: "have created the smith that bloweth the coals in the fire, and that bringeth forth an instrument for his work;"