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ensure

 - 3 dictionary results

en⋅sure

[en-shoor, -shur]
–verb (used with object), -sured, -sur⋅ing.
1. to secure or guarantee: This letter will ensure you a hearing.
2. to make sure or certain: measures to ensure the success of an undertaking.
3. to make secure or safe, as from harm.
4. insure (defs. 1–3).

Origin:
1350–1400; ME ensuren < AF enseurer. See en- 1 , sure


en⋅sur⋅er, noun


3. protect, guard, safeguard.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To ensure
en·sure   (ěn-shŏŏr')   
tr.v.   en·sured, en·sur·ing, en·sures
To make sure or certain; insure: Our precautions ensured our safety. See Usage Note at assure.

[Middle English ensuren, from Anglo-Norman enseurer : Old French en-, causative pref.; see en-1 + Old French seur, secure, variant of sur; see sure.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

ensure 
c.1385, from Anglo-Fr. enseurer, from en- "make" + O.Fr. seur "sure," probably infl. by O.Fr. asseurer "assure."
Online Etymology Dictionary, © 2001 Douglas Harper
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