9 Grammatical Pitfalls
mid-14c. (as a surname late 13c.), from Old French pestel, from Latin pistillum "pounder, pestle," related to pinsere "to pound," from PIE *pis-to-, suffixed form of root *peis- "to crush" (cf. Sanskrit pinasti "pounds, crushes," pistah "anything ground, meal," Greek ptissein "to winnow," Old Church Slavonic pišo, pichati "to push, thrust, strike," pišenica "wheat," Russian pseno "millet").
pestle pes·tle (pěs'əl, pěs'təl)
A club-shaped, hand-held tool for grinding or mashing substances in a mortar.