rusting

/R AH1 S T IH0 NG/
verb
  1. 1

    To oxidize, especially of iron or steel.

    โ€œThe patio furniture had rusted in the wind-driven spray.โ€

  2. 2

    To cause to oxidize.

    โ€œThe wind-driven spray had thoroughly rusted the patio furniture.โ€

  3. 3

    To be affected with the parasitic fungus called rust.

  4. 4

    To (cause to) degenerate in idleness; to make or become dull or impaired by inaction.

noun
  1. 1

    The development of rust on a surface.

Source: https://en.wiktionary.org/wiki/rust, https://en.wiktionary.org/wiki/rusting