washboard

n board with ridges on it used (esp formerly) for rubbing clothes on when washing them 搓板.

wart-hog, wartime, warty, wary, was, wash, wash (sth) off, wash basin, wash out (of a dirty mark), wash over sb, wash sth down (with sth), wash up, wash-cloth, wash-day, wash-drawing, wash-leather, wash-out, wash-stand, wash-tub, washable, washed out, washed up, washer, washing, washing-machine, washing-powder, washing-soda, washing-up, Washington, Washington D.C., washroom, washtub, washwoman, washy, wasn't, wasp, WASP (also Wasp), wasp-waisted, waspish, waspishly,