Achuron denotes the material set apart from wheat and burned after threshing-floor clearing.

The attested use identifies material separated from wheat or grain during the clearing of a threshing floor and then burned, as shown in Luke 3:17 and Matthew 3:12.

1. Material separated from grain for burning · dominant

   In Luke 3:17 and Matthew 3:12, the accusative singular neuter form occurs in the contrast between gathering wheat or grain into storage and burning what remains after the threshing floor is cleared. The APB renders the clauses "but the chaff he will burn with unquenchable fire."

   Luke 3:17Matthew 3:12

In the Anselm Project Bible: Across Luke 3:17 and Matthew 3:12, the APB presents the contrasted material as "the chaff" that is burned.