SWIVEL

I. noun Usage: often attributive Etymology: Middle English; akin to Old English swīfan to revolve, Old High German swebōn to roll, heave Date: 14th century a device joining two parts so that one or both can pivot freely (as on a bolt or pin), II. verb (-eled or -elled; -eling or ~ling) Date: 1775 transitive verb to turn on or as if on a ~ , intransitive verb to swing or turn on or as if on a ~