Definition

To undergo a process of corrosion or decay, often resulting in a reddish-brown color, typically due to exposure to moisture and air.

Example

The old bicycle began to rust after being left outside in the rain for weeks.

Tense Forms

Conversation

Have you seen the old bike in the garage?

Yeah, I noticed it's starting to rust a bit.

I should probably clean it up before it gets worse.

Definitely! Otherwise, it might just sit there and rust away.

Synonyms & Antonyms

Definition

A reddish-brown coating that forms on iron and other metals when they corrode, often due to moisture and oxygen. It can also refer to a plant disease caused by certain fungi that leaves spots on plants.

Example

The old bike was covered in rust after being left outside for years.

Conversation

Have you seen the old bike in my garage?

Yeah, I noticed it has some rust on it.

I should really clean it up before it gets worse.

Definition

To cause a metal to develop a reddish-brown coating due to oxidation, often from exposure to moisture or air.

Example

The rain will rust the old bicycle if it is left outside.

Tense Forms

Conversation

Hey, have you seen my old bike?

Yeah, I think it's in the garage, but it might be rusted.

I really need to clean it up before summer.

Root Explanation

The word 'rust' originates from Old English 'rust', which means the reddish-brown coating that forms on iron or steel due to oxidation. It is related to the Proto-Germanic '*rustaz', meaning to become red or to be red, reflecting the color of oxidized metal.

Memory Tip

Think of the reddish-brown color that forms on metal when it oxidizes — that's what 'rust' refers to.

Visually Confused Words