Poniard
Poniard , noun
[French poignard (compare Italian pugnale, Sp. puñal), from Latin pugio, -onis; probably akin to pugnus fist, or from pugnus fist, as held in the fist. See Pugnacious.]
A kind of dagger, -- usually a slender one with a triangular or square blade.
She speaks poniards, and every word stabs.
Poniard , transitive verb
To pierce with a poniard; to stab. — Cowper