Definition

A person or thing that reverses or cancels something that has been done.

Example

The undoer of the mistake quickly fixed the error in the report.

Conversation

I just found out that I'm the undoer of my own mistakes.

What do you mean by that?

Well, I keep fixing my errors but end up making new ones instead.

That sounds frustrating! Maybe you need a break from it all.

Synonyms & Antonyms

Root Explanation

Undoer → It is formed from "un-" (meaning not or opposite of) and "do" (from Old English "don", meaning to perform or act) and "-er" (meaning a person who). The word "undoer" refers to a person who reverses an action or negates something that has been done.

Memory Tip

Think of someone who is the opposite of doing something — 'un-' means not, 'do' means to act, and '-er' indicates a person. An undoer is someone who negates or reverses an action.

Visually Confused Words