dilute

[dih-loot, dahy-; adj. also dahy-loot]
verb (used with object), diluted, diluting.
1.
to make (a liquid) thinner or weaker by the addition of water or the like.
2.
to make fainter, as a color.
3.
to reduce the strength, force, or efficiency of by admixture.
verb (used without object), diluted, diluting.
4.
to become diluted.
adjective
5.
reduced in strength, as a chemical by admixture; weak: a dilute solution.

Origin:
1545–55; < Latin dīlūtus washed away, dissolved (past participle of dīluere), equivalent to dī- di-2 + -lūtus, combining form of lautus (lav(ere) to wash + -tus past participle suffix)

diluter, dilutor, noun
dilutive, adjective
antidilutive, adjective
overdilute, verb, overdiluted, overdiluting.
undilute, adjective
undiluted, adjective
undiluting, adjective

dilate, dilute.


3. weaken, temper, mitigate, diminish.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dilute (daɪˈluːt)
 
vb
1.  to make or become less concentrated, esp by adding water or a thinner
2.  to make or become weaker in force, effect, etc: he diluted his story
 
adj
3.  chem
 a.  (of a solution, suspension, mixture, etc) having a low concentration or a concentration that has been reduced by admixture
 b.  (of a substance) present in solution, esp a weak solution in water: dilute acetic acid
 
[C16: from Latin dīluere, from dis- apart + -luere, from lavāre to wash]
 
dilu'tee
 
n
 
di'luter
 
n

undiluted (ˌʌndaɪˈluːtɪd)
 
adj
1.  not diluted with water or any other liquid: undiluted fruit juice
2.  not moderated or qualified in any way: expressing undiluted pleasure

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Etymonline
Word Origin & History

dilute
1550s, from L. dilutus, pp. of diluere "dissolve, wash away, dilute," from dis- "apart" + -luere, comb. form of lavere "to wash" (see lave). Related: Diluted.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

dilute di·lute (dī-lōōt', dĭ-)
v. di·lut·ed, di·lut·ing, di·lutes
To reduce a solution or mixture in concentration, quality, strength, or purity, as by adding water. adj.
Thinned or weakened by diluting.


di·lu'tive adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
These days markets prefer measures using tangible common equity, which is
  undiluted by hybrid capital such as preferred stock.
Undiluted vinegar is suitable, as is a mixture of vinegar and water.
Ten minutes after dropping a piece of leaf into a test tube of undiluted
  bleach, a white piece of debris floated to the top.
If the hardliners prevail, undiluted, prospects for successful dialogue are
  remote.
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