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[jak-ham-er] /ˈdʒækˌhæm ər/
a portable drill operated by compressed air and used to drill rock, break up pavement, etc.
Origin of jackhammer
1925-30, Americanism; jack1 + hammer Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for jackhammer
  • Frequent and prolonged jackhammer use can turn a laborer's fingers white and numb.
  • They extracted him with a small jackhammer and some ice axes, puncturing his hip in the process.
  • With a rumble loud enough to rival a jackhammer, she broadcasts her availability for mating.
  • She thrashed and twisted on the stretcher as if trying to get out from under a jackhammer.
  • Skill in operating a jackhammer as needed to install or repair street light equipment.
  • Skill in operating a jackhammer as needed to install or repair street lighting equipment.
  • The guidance suggests using a water-spray attachment to suppress dust when operating construction equipment such as a jackhammer.
  • jackhammer drills were lowered to them, and powder holes were drilled into the rock.
  • A pneumatic drill or jackhammer is a portable percussive drill powered by compressed air.
British Dictionary definitions for jackhammer


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 jackhammer

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

Online Etymology Dictionary, © 2010 Douglas Harper
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