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Verb: comminute  'kó-mi,n(y)oot
Usage: rare
  1. Reduce to small pieces or particles by pounding or abrading
    "They comminuted the ore before processing";
    - grind, mash, crunch, bray [archaic]

Derived forms: comminuting, comminutes, comminuted

Type of: break up, fragment, fragmentise [Brit], fragmentize