Definition

To open or spread out something that has been folded or doubled, such as a piece of paper.

Example

She decided to undouble the letter to read it more easily.

Tense Forms

Conversation

Can you help me undouble this dollar bill?

Sure! It’s a bit crumpled, isn’t it?

Yeah, I just want it to look nice again.

I totally get that; a fresh bill always feels better!

Synonyms & Antonyms

Root Explanation

Undouble → It is formed from "un-" (meaning not or opposite of) and "double" (from Old French *doble*, meaning twofold or twice). The word "undouble" means to make something not double or to reduce it from a double state.

Memory Tip

Think of 'un-' meaning not or opposite, and 'double' meaning twofold — so undouble means to make something not twofold.

Visually Confused Words