From Middle English rakyl (“chain”), apparently related to Old Frisian rakels (“chain”), French racle ("the iron ring of a door") (from a Germanic source), and also Middle English rakente, from Old English racente (“chain, fetter”). More at rackan.
rackle (plural rackles)
- rakkill (Scotland)
Origin uncertain. Probably from rack (“to drive; move; go forward rapidly”), alteration of Middle English reken (“to drive; move; tend”), from Old Norse reka, vreka (“to drive; drift; toss”) + -le (“tending or prone to”). Related to Icelandic reka, Swedish vräka, Danish vrage, English wrack.