Definition

Describing a substance that has thickened or formed lumps, often used in reference to milk or cream that has spoiled or been heated.

Example

The milk had curdled after being left out too long.

Conversation

Did you see that milk I left out on the counter?

Yeah, I noticed it looked a bit curdled when I walked by.

I can't believe I forgot it; it was still good yesterday!

Sounds like it turned quickly — better check the fridge next time.

Synonyms & Antonyms

Definition

To have changed from a liquid to a solid state, often used in reference to milk that has spoiled or thickened.

Example

The milk curdled after being left out of the fridge for too long.

Tense Forms

Conversation

Did you notice how the milk curdled when I left it out too long?

Yeah, that was a bit of a mess!

I really should have put it back in the fridge sooner.

Root Explanation

Curdled comes from the Old English 'cyrdel' (meaning to curdle or coagulate), which is related to the process of milk thickening or forming curds. The word describes the transformation of liquid into a solid or semi-solid state, particularly in dairy products.

Memory Tip

Think of milk 'thickening' or 'coagulating' — that's what curdled means, as it refers to the process of milk turning into curds.

Visually Confused Words