"double thread," from P.Gmc. *twizna-
(cf. Du. twijn
, Low Ger. twern
, Ger. zwirn
"twine, thread"), from the same root as twin
(q.v.). The verb meaning "to twist strands together to form twine" is recorded from c.1275; sense of "to twist around something" (as twine does) is recorded from c.1300.