Definitions from Wiktionary (jackhammer)

▸ noun:  A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
▸ noun:  (figurative) Something that is very strong but also very rigid.
▸ verb:  (intransitive) To use a jackhammer.
▸ verb:  (transitive) To break (something) using a jackhammer.
▸ verb:  (transitive) To form (something) using a jackhammer.
▸ verb:  (intransitive, figurative) To move like a jackhammer.
▸ verb:  To beat hard, to pound. (of the heart or pulse)
▸ verb:  (transitive, figurative) To move (something) like a jackhammer.
▸ verb:  (transitive, figurative) To strike (something) repeatedly with force, to pound.
▸ Also see jackhammer

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