rust away

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rust away

1. To become increasingly covered in rust. Why don't we finally sell that old car? It's just been rusting away in the street for the last two years.
2. To dissolve or disintegrate due to corrosion. The access panel completely has rusted away, exposing the sensitive electronics inside to the elements.
See also: away, rust
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

rust away

to dissolve away into rust. In a few years, this car will rust away if you don't take care of it. The bridge is rusting away, little by little.
See also: away, rust
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
But some descendants of the victims consider the wreck a grave site which should be left in peace until it rusts away.
AS YOUR barbecue rusts away in the back garden and ducks take up residence in your sun lounger, it might be time to think of websites devoted to holiday-making, either in the form of cheap flights, cheap hotels or general tourist information.