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pon·iard | \ ˈpän-yərd 
\
\Definition of poniard
(Entry 1 of 2)
: a dagger with a usually slender blade of triangular or square cross section
poniard
verbponiarded; poniarding; poniards
Definition of poniard (Entry 2 of 2)
: to pierce or kill with a poniard
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The first known use of poniard was in 1533
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