Definition

Not able to rust or corrode, often used to describe materials that resist oxidation.

Example

The new outdoor furniture is made from rustproof metal, so it will last for years without damage.

Conversation

I just bought a new bike, and it's rustproof!

That's awesome! I hate when bikes rust after a while.

Yeah, I wanted something durable for all weather conditions.

Good choice! It will definitely last longer that way.

Synonyms & Antonyms

Root Explanation

Rustproof → It is formed from "rust" (from Old English *rust*, meaning the reddish-brown oxide that forms on iron) and "proof" (from Old English *profa*, meaning to test or to prove). The word "rustproof" means resistant to rust or able to withstand rusting.

Memory Tip

Think of something that is 'tested' ('proof') to be 'resistant' to 'rust' — that's why rustproof means it won't rust.

Visually Confused Words