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general::
Phrase(s): grind something into something
1. to pulverize something into powder, grit, particles, etc. • The machine ground the rocks into gravel. • The mill ground the grain into flour. 2. and grind something in to crush or rub something into something. • People’s feet ground the cigarette ashes into the carpet. • Their feet ground in the ashes.
McGrawhill's American Idioms And Phrasal Verbs