Definition

To make a serious mistake or to act in a clumsy way.

Example

He tends to blunder when he is nervous.

Tense Forms

Conversation

Did you see how I blundered during the presentation yesterday?

Yeah, you seemed a bit nervous, but it happens to everyone.

I felt like I blundered my way through the entire thing!

Don't worry, you'll get better with practice — just keep at it.

Synonyms & Antonyms

Definition

A serious mistake that often happens because someone is confused or not paying attention.

Example

He made a blunder during the presentation that embarrassed him.

Conversation

I can't believe I made such a huge blunder in the presentation yesterday.

What happened? I thought it went well!

I mixed up the data, and it really confused everyone.

Definition

To make a serious mistake or error, often due to carelessness or lack of thought.

Example

He blundered the presentation by forgetting key points.

Tense Forms

Conversation

I really blundered during my presentation today.

Oh no! What happened?

I mixed up the data and said the wrong numbers.

Root Explanation

Blunder originates from Middle English 'blunderen', which is of uncertain origin but may be related to the Old Norse 'blundra', meaning to stumble or to be blind. The word describes a mistake made due to carelessness or confusion.

Memory Tip

Think of someone who 'stumbles' or is 'blind' to their mistakes, which helps you remember that a blunder is a careless error.

Visually Confused Words