עָקֵב ʻâqêb (H6119)

a heel (as protuberant); hence, a track; figuratively, the rear (of an army)

1) heel, rear, footprint, hinder part, hoof, rear of a troop, footstep 1a) heel 1b) mark of heel, footprint 1c) hinder part, rear

or (feminine) עִקְּבָה; from עָקַב (H6117);