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en·sure (en s̸ho̵or′, in-)

transitive verb ensured -·sured′, ensuring -·sur′·ing

  1. to make sure or certain; guarantee; secure: measures to ensure accuracy
  2. to make safe; protect: safety devices to ensure workers against accidents
  3. Obsolete insure

Origin: ME ensuren < Anglo-Fr enseurer (for OFr asseurer: see assure) < en- (see en-) + OFr seur, sure

en·sure (ĕn-sho͝orˈ)

transitive verb ensured en·sured, ensuring en·sur·ing, en·sures
To make sure or certain; insure: Our precautions ensured our safety. See Usage Note at assure.

Origin: Middle English ensuren, from Anglo-Norman enseurer : Old French en-, causative pref.; see en- 1 + Old French seur, secure, variant of sur; see sure .

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