rustless

That does not rust; stainless.

Adjective

  1. That does not rust; stainless.
    • Now motor roads are dustless, The latest steel is rustless, Our tennis courts are sodless, Our new religions, godless. - 1936, Arthur Guiterman, First Dentistry was Painless:
  2. Without rust; unrusted.
    • All this upper work, however, was rustless, and the paint in good condition. The lower and much rusted part of the column […] - 1903, Proceedings of the American Society of Civil Engineers, Volume 29, Part 1:

Origin

From rust + -less.

Derived

rustlessness