Scrub \Scrub\ (skr[u^]b), v. t. [imp. & p. p. Scrubbed (skr[u^]bd); p. pr. & vb. n. Scrubbing.]

[OE. scrobben, probably of Dutch or Scand. origin; cf. Dan. sckrubbe, Sw. skrubba, D. schrobben, LG. schrubben.]

To rub hard; to wash with rubbing; usually, to rub with a wet brush, or with something coarse or rough, for the purpose of cleaning or brightening; as, to scrub a floor, a doorplate.

Source: Webster's Revised Unabridged Dictionary (1913)