Definition

To weaken or damage something gradually, often by removing support or causing erosion.

Example

The constant criticism began to undermine her confidence.

Tense Forms

Conversation

I think his constant criticism might undermine her confidence.

Yeah, that can really affect how she feels about her work.

It's sad because she does such a great job.

Exactly! We need to support each other instead of letting doubts undermine our efforts.

Synonyms & Antonyms

Root Explanation

Undermine is formed from "un-" (meaning not) and "mine" (from Old English "minan", meaning to dig or excavate). The word describes the act of digging away at the foundation or support of something, often in a metaphorical sense.

Memory Tip

Think of 'not' ('un-') supporting something that is 'dug out' ('mine') — that's why undermine means to weaken or damage something.

Visually Confused Words