pes·tle [pes-uh l, pes-tl]
1. a club-shaped, round-headed stick used in a mortar to pound, crush, rub, or grind things.
2. any tool used as a pestle.
3. the leg and leg bone of an animal, especially that of a pig.
verb (used with object), pes·tled, pes·tling.
4. to rub, pound, crush, or grind things with, or as if with, a pestle.
verb (used without object), pes·tled, pes·tling.
5. to work with a pestle.
1300-50; Middle English pestel < Middle French < Latin pistillum, derivative of pistus, past participle of pīnsere to pound, crush