manducate(v = verb.consumption) chew, jaw, masticate - chew (food); to bite and grind with the teeth; "He jawed his bubble gum"; "Chew your food and don't swallow it!"; "The cows were masticating the grass"
is one way to grate, grind
Sample sentences: Somebody ----s; Somebody ----s something

   To masticate; to chew; to eat. Jer. Taylor. [1913 Webster]

manducate, v.tr. literary chew; eat.

Derivative:
manducation n. manducatory adj.

Etymology:
L manducare manducat- chew f. manduco guzzler f. mandere chew