jackhammer


jack·ham·mer

noun \ˈjak-ˌha-mər\

: a heavy tool used to break hard substances (such as concrete) into pieces by a repeated pounding action

Full Definition of JACKHAMMER

1
:  a pneumatically operated percussive rock-drilling tool usually held in the hands
2
:  a device in which a tool (as a chisel for breaking up pavements) is driven percussively by compressed air
jackhammer verb

First Known Use of JACKHAMMER

1916

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