单词	jackhammer
释义	jackhammer noun jack·​ham·​mer ˈjak-ˌha-mər  1 : a pneumatically operated percussive rock-drilling tool usually held in the hands 2 : a device in which a tool (such as a chisel for breaking up pavements) is driven percussively by compressed air jackhammer verb Example Sentences Recent Examples on the Web Ibanez stepped up to the challenge to build eight-strings for the duo, heavily reinforced to handle the bowel-churning lows and jackhammer-like highs that are the band’s stock-in-trade. Spin Staff, SPIN, 6 Sep. 2022 If it is subjected to another, bigger jolt that matches that frequency, the vibration will be amplified—like a jackhammer outside causes a kitchen tabletop to rattle. Rachel Berkowitz, Scientific American, 18 Aug. 2022 The workers parked their truck, hoisted a jackhammer, a full gas can and shovels on their backs, and began to march up through the brush. Los Angeles Times, 14 Aug. 2022 This alarm can be turned up to an aggressive 113 decibels, which is about as loud as a rock concert, a jackhammer or a symphony orchestra according to the Hearing Health Foundation. Abigail Bailey, Good Housekeeping, 5 Aug. 2022 Residents have previously told of hearing a backhoe and jackhammer overnight between the first and second days of the dig — when the work was supposed to have been paused — and seeing a convoy of FBI vehicles, including large armored trucks. Fox News, 31 May 2022 Residents have previously told of hearing a backhoe and jackhammer overnight between the first and second days of the dig — when the work was supposed to have been paused — and seeing a convoy of FBI vehicles, including large armored trucks. Fox News, 31 May 2022 Residents have previously told of hearing a backhoe and jackhammer overnight between the first and second days of the dig — when the work was supposed to have been paused — and seeing a convoy of FBI vehicles, including large armored trucks. Fox News, 31 May 2022 Rapid fire from the large-caliber guns on armored personnel carriers, sounding like a jackhammer at work, echoed around the area. New York Times, 9 June 2022 See More Word History First Known Use 1912, in the meaning defined at sense 1
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