pestle
noun [ C ] uk/ˈpes.əl/ us/ˈpes.əl/
杵；碾槌
a heavy stick made of clay, stone, or metal with a thick, rounded end, used for crushing substances in a mortar (= a small strong bowl) by hitting or rubbing them
Crush the garlic into a paste using a pestle and mortar. 用杵和臼把蒜捣成泥。