O.E. cnyttan "to tie with a knot, bind, fasten," related to O.N. knytja, M.L.G. knütten "to tie, knot," O.E. cnotta "a knot," from P.Gmc. *knuttjan, from stem *knutt-. Of brows, late 14c. Meaning "to do knitting" (especially plain stitch) is from 1530. Knitting "knitted work" attested from 1880.