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rust

 
 
pronunciation:
ruhst
parts of speech:
noun, verb
features:
Word Combinations (noun, verb), Word Explorer
part of speech: noun
definition: an orange, red, or brown substance that forms on the surface of some metals that have had contact with water and air.
The metal parts of the old bicycle have rust.
 
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part of speech: verb
inflections: rusts, rusting, rusted
definition: to become rusty.
The fender of my bike is rusting.
 
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See
  water