Scrub

v. (bb) 1 clean by rubbing, esp. with a hard brush and water. 2 (often foil. by up) (of a surgeon etc.) clean and disinfect the hands and arms before operating. 3 colloq. scrap or cancel. 4 use water to remove impurities from (gases etc.). n. scrubbing or being scrubbed. [Low German or Dutch]