Scrub

verb (used with object), scrubbed, scrubbing.
1.
to rub hard with a brush, cloth, etc., or against a rough surface in washing.
2.
to subject to friction; rub.
3.
to remove (dirt, grime, etc.) from something by hard rubbing while washing.
4.
Chemistry. to remove (impurities or undesirable components) from a gas by chemical means, as sulfur dioxide from smokestack gas or carbon dioxide from exhaled air in life-support packs.
5.
to cancel or postpone (a space flight or part of a mission):
Ground control scrubbed the spacewalk.
6.
Slang. to do away with; cancel:
Scrub your vacation plans—there’s work to do!
verb (used without object), scrubbed, scrubbing.
7.
to cleanse something by hard rubbing.
8.
to cleanse one’s hands and arms as a preparation to performing or assisting in surgery (often followed by up).
noun
9.
an act or instance of scrubbing.
10.
a canceled or postponed space flight, launching, scheduled part of a space mission, etc.
11.
something, as a cosmetic preparation, used for scrubbing.
noun
1.
low trees or shrubs collectively.
2.
a large area covered with low trees and shrubs, as the Australian bush.
3.
a domestic animal of mixed or inferior breeding; mongrel.
4.
a small or insignificant person.
5.
anything undersized or inferior.
6.
Sports. a player not belonging to the varsity or regular team; a player who is not first-string.
adjective
7.
small, undersized, or stunted.
8.
inferior or insignificant.
9.
abounding in or covered with low trees and shrubs:
They rode through scrub country.
verb scrubs, scrubbing, scrubbed
1.
to rub (a surface) hard, with or as if with a brush, soap, and water, in order to clean it
2.
to remove (dirt), esp by rubbing with a brush and water
3.
(intransitive) foll by up. (of a surgeon) to wash the hands and arms thoroughly before operating
4.
(transitive) to purify (a vapour or gas) by removing impurities
5.
(transitive) (informal) to delete or cancel
6.
(intransitive) (horse racing, slang) (of jockeys) to urge a horse forwards by moving the arms and whip rhythmically forwards and backwards alongside its neck
noun
7.
the act of or an instance of scrubbing
noun
1.

vegetation consisting of stunted trees, bushes, and other plants growing in an arid area
(as modifier): scrub vegetation

2.
an area of arid land covered with such vegetation
3.

an animal of inferior breeding or condition
(as modifier): a scrub bull

4.
a small or insignificant person
5.
anything stunted or inferior
6.
(sport, US & Canadian) a player not in the first team
7.
(Austral, informal) the scrub, a remote place, esp one where contact with people can be avoided
adjective
8.
small, stunted, or inferior
9.
(sport, US & Canadian)

(of a player) not in the first team
(of a team) composed of such players
(of a contest) between scratch or incomplete teams

scrub 1
scrub 2