aft (adv.) Look up aft at Dictionary.com
Old English æftan "from behind, behind, farthest back," from superlative of Old English æf, af, of "away, away from, off" (from PIE root *apo-; see of). The Germanic superlative suffix *-ta corresponds to PIE *-to (compare Greek protos "first," superlative of pro "before"). The word is now purely nautical, "in, near, or toward the stern of a ship."