swim

For the verb: "to swim"

Simple Past:	swam
Past Participle:	swum

Concise Oxford English Dictionary © 2008 Oxford University Press:
swim/swɪm/

▶verb (swims, swimming; past swam; past part. swum)

• 1 propel oneself through water by bodily movement.

  ■ cross (a stretch of water) in this way.

  ■ float.

• 2 be immersed in or covered with liquid.

• 3 appear to whirl before one's eyes.

  ■ experience a dizzily confusing sensation.

▶noun

• 1 an act or period of swimming.

• 2 a pool in a river which is a particularly good spot for fishing.

– phrases
in the swim involved in or aware of current affairs or events.

– derivatives
swimmable adjective,
swimmer noun,
swimming noun.

– origin OE swimman, of Gmc origin.