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hammer

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noun [countable] hammer pronunciation in British English /ˈhæmə(r)/ 
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singularhammer
pluralhammers
  1. 1
    a tool used for hitting things or forcing nails into wood that consists of a handle and a heavy metal top with one flat side

    He smashed a hole in the window with a hammer.

    take a hammer to something (=hit something hard using a hammer):

    She took a hammer to the headlamps of his car.

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