Strong’s Greek
G892 — achuron
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἄχυρον
achuron — pronounced akh'-oo-ron
perhaps remotely from cheo (to shed forth); chaff (as diffusive):--chaff.
2 occurrences in the KJV.
Matthew 3:12
Whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.
Luke 3:17
Whose fan is in his hand, and he will throughly purge his floor, and will gather the wheat into his garner; but the chaff he will burn with fire unquenchable.