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plunge in

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plunge in(to something)

to dive or rush into something; to immerse oneself in something. Ned took off his shoes and plunged into the river, hoping to rescue Frank. He plunged into his work and lost track of time.

See also: plunge

plunge in

v.

1. To submerge something quickly into something else: The cook plunged the hot eggs in the cold water to stop them from cooking.

2. To jump or throw oneself into something: I walked up to the swimming pool and plunged in.

3. To fall into something: The child slipped and plunged in the well.

See also: plunge