ETYM Old Eng. lasche; cf. Dutch lasch piece set in, joint, seam, German lashe latchet, a bit of leather, gusset, stripe, laschen to furnish with flaps, to lash or slap, Icel. laski gusset, flap, laska to break.
The flexible part of a whip; SYN. thong.

ETYM Cf. Dutch lasschen to fasten together, lasch piece, joint, Swed. laska to stitch, Dan. laske stitch. Related to Lash.
1. To bind with a rope, chain, or cord.
2. To lash about; flick sharply, as of animals' tails.