"strong thread made from twisted strands," Old English twin "double thread," from Proto-Germanic *twiznaz "double thread, twisted thread" (source also of Dutch twijn, Low German twern, German zwirn "twine, thread"), from PIE root *dwo- "two."
"to twist strands together to form twine," c. 1300, from twine (n.) and probably also from Old Norse tvinna "to double." Sense of "to twist around something" (as twine does) is recorded from late 14c. Related: Twined; twining.
twine a rope