garner (n.)

"a granary," late 12c., gerner, from Old French gernier, metathesized variant of grenier "storehouse, loft for grain," from Latin granarium (usually plural, granaria) "store-house for grain," from granum "grain," from PIE root *gre-no- "grain."

late 15c., "to store grain," from garner (n.). Related: Garnered; garnering.