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impetus

Pronunciation: /ˈɪmpɪtəs/
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Definition of impetus

noun

[mass noun]
  • the force or energy with which a body moves:hit the booster coil before the flywheel loses all its impetus
  • something that makes a process or activity happen or happen more quickly:the ending of the Cold War gave new impetus to idealism

Origin:

mid 17th century: from Latin, 'assault, force', from impetere 'assail', from in- 'towards' + petere 'seek'

impetus in other Oxford dictionaries

Definition of impetus in the US English dictionary
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