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rustproof

[ruhst-proof] /ˈrʌstˌpruf/
adjective
1.
not subject to rusting.
verb (used with object)
2.
to coat with a substance that prevents rusting.
Origin of rustproof
1685-1695
First recorded in 1685-95; rust + -proof
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for rustproof

rustproof

/ˈrʌstˌpruːf/
adjective
1.
treated against rusting
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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