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perfunctory
Definition: (adjective) unenthusiastic, routine, or mechanical.
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gnash  audio  (nsh) KEY 

TRANSITIVE VERB:
gnashed, gnash·ing, gnash·es
  1. To grind or strike (the teeth, for example) together.
  2. To bite (something) by grinding the teeth.

ETYMOLOGY:
Alteration of Middle English gnasten, gnaisten, possibly of Scandinavian origin; akin to Old Norse gnastan, a gnashing

OTHER FORMS:
gnash(Noun)


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