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De- Definition
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de-

 
Use de- in a Sentence
a prefix occurring in loanwords from Latin (decide); also used to indicate privation, removal, and separation (dehumidify), negation (demerit; derange), descent (degrade; deduce), reversal (detract), intensity (decompound). Compare di- 2 , dis- 1 .
Origin:
ME < L dē-, prefixal use of dē (prep.) from, away from, of, out of; in some words, < F < L dē- or dis- dis- 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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de-  
pref.  
  1. Do or make the opposite of; reverse: decriminalize.
  2. Remove or remove from: delouse; deoxygenate.
  3. Out of: deplane; defenestration.
  4. Reduce; degrade: declass.
  5. Derived from: deverbative.

[Middle English de-, from Old French de- (from Latin dē-, from, off, apart, away, down, out, completely, from dē; see de- in Indo-European roots) or from Old French des-, out, off, apart, away, completely (from Latin dis-, dis-, and Latin dē-).]
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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De-

De-\ A prefix from Latin de down, from, away; as in debark, decline, decease, deduct, decamp. In words from the French it is equivalent to Latin dis-apart, away; or sometimes to de. Cf. Dis-. It is negative and opposite in derange, deform, destroy, etc. It is intensive in deprave, despoil, declare, desolate, etc.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : de-
Spanish: por; al, a la,
German: pro,
Japanese: ～につき
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de- pref.

  1. Do or make the opposite of; reverse: decomposition.
  2. Remove or remove from: deoxygenation.
  3. Reduce; degrade: decholesterolization.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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