The same as abuwr; passed, i.e. Kept over; used only of stored grain -- old corn.
see HEBREW abuwr
H5669. abur
I. [עָבוּר] noun [masculine] produce, yield (compare Assyrian ebûru, id., DlHWB 11; Syriac corn); — construct הָאָרֶץ עֲבוּד Joshua 5:11-12, (P).