-sə(r) noun
( -s )
Etymology: Middle English percer, persour, from Anglo-French perceour, persour, from Old French percer to pierce + Anglo-French -our, -eour -er — more at pierce
: one that pierces: as
a. archaic : a keen eye
b. : an instrument (as an auger, gimlet, or stiletto) for boring or making holes
c. : a worker that pierces by hand or machine
d. : the ovipositor or the sting of an insect