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Definitions from WordNet

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Jackhammer

Noun - Tool

A jackhammer is a powerful tool used for breaking up concrete, asphalt, and other hard surfaces. It consists of a motorized hammer-like device that delivers rapid blows to the surface being worked on.

Example sentence: The construction worker used a jackhammer to break apart the old concrete pavement.

Noun - Person

A jackhammer, in informal usage, refers to a person who talks loudly and aggressively, often dominating conversations or discussions.

Example sentence: Tim can be quite the jackhammer, always interrupting and speaking over everyone else.

Verb

To jackhammer means to break up or demolish something using a jackhammer tool.

Example sentence: The workers jackhammered the old foundation to make way for a new building.

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