water-proofing

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waterproof

[waw-ter-proof, wot-er-]
adjective
1.
impervious to water.
2.
rendered impervious to water by some special process, as coating or treating with rubber: a waterproof hat.
noun
3.
Chiefly British. a raincoat or other outer coat impervious to water.
4.
any of several coated or rubberized fabrics that are impervious to water.
verb (used with object)
5.
to make waterproof.

Origin:
1730–40; water + -proof

waterproofer, noun
waterproofness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
waterproof (ˈwɔːtəˌpruːf)
 
adj
1.  water-repellent Compare water-resistant not penetrable by water
 
n
2.  chiefly (Brit) a waterproof garment, esp a raincoat
 
vb
3.  to make (a fabric, item of clothing, etc) waterproof

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

waterproof
1736, from water + proof. The verb is first recorded 1843.
Online Etymology Dictionary, © 2010 Douglas Harper
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