Strong's #254: 'ach (pronounced awkh)

of uncertain derivation; a fire-pot or chafing dish:-- hearth.

Brown-Driver-Briggs Hebrew Lexicon:

'âch

1) fire-pot, brazier

Part of Speech: noun feminine

Relation: of uncertain derivation

Usage:

This word is used 3 times:

 

Jeremiah 36:22: "in the winterhouse in the ninth month: and there was a fire on the hearth burning before"
Jeremiah 36:23: "it into the fire that was on the hearth, until all the roll"
Jeremiah 36:23: "in the fire that was on the hearth."