Meaning : Machine consisting of a heavy bar that moves vertically for pounding or crushing ores.

Meaning : A heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone.

Meaning : A club-shaped hand tool for grinding and mixing substances in a mortar.

Meaning : Grind, mash or pulverize in a mortar.