To Scrub

1. (transitive) 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
2. (intransitive) To rub anything hard, especially with a wet brush; to scour
3. (intransitive, figuratively) To be diligent and penurious
4. (transitive) To call off a scheduled event; to cancel.
5. (databases, transitive) To eliminate or to correct data from a set of records to bring it inline with other similar datasets
6. (audio) To move a recording tape back and forth with a scrubbing motion to produce a scratching sound, or to do so by a similar use of a control on an editing system.
7. (audio, video) To maneuver the play position on a media editing system by using a scroll bar or touch-based interface. Synonym: seek