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jackhammer

[jak-ham-er] /ˈdʒækˌhæm ər/
noun
1.
a portable drill operated by compressed air and used to drill rock, break up pavement, etc.
Origin
1925-1930
1925-30, Americanism; jack1 + hammer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for jack-hammer

jackhammer

/ˈdʒækˌhæmə/
noun
1.
a hand-held hammer drill, driven by compressed air, for drilling rocks, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for jack-hammer

jackhammer

n.

also jack hammer, 1903, from jack (n.) + hammer (n.). As a verb by 1965.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for jack

17
20
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