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jack mackerel
jack-o’-lantern
jack-of-all-trades
jack off
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jackhammer
jack·ham·mer
[
ják hàmmər
]
(
plural
jack·ham·mers
)
noun
Definition:
pounding power tool:
a handheld power tool, usually powered by compressed air and used for splitting or drilling rock, or for breaking up paved areas
[
<jack
1
implying "small"
]
jack·ham·mer
transitive and intransitive verb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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jack·ham·mer transitive and intransitive verb
