Twirl
late 16th century: probably an alteration (by association with whirl) of tirl, a variant of archaic trill ‘twiddle, spin’.
wiktionary
Of Scandinavian origin, akin to Norwegian Nynorsk tvirla, Old High German dweran [1] (German zwirlen, quirlen) and Icelandic þyrill; [2] all from Proto-Germanic *þweraną(“to stir”). [3] Or, an alteration of tirl(“to twist”), with influence from whirl. [4]
etymonline
twirl (v.)
1590s, "move round rapidly" (intransitive), of uncertain origin, possibly connected with Old English þwirl "a stirrer, handle of a churn," and Old Norse þvara "pot-sticker, stirrer." Or on another guess a blend of twist and whirl. Transitive sense, "cause to revolve rapidly," is from 1620s. Related: Twirled; twirling.
twirl (n.)
1590s, "rapid circular motion," from twirl (v.).
