Definition

A person who enters a place without permission, often causing trouble or fear.

Example

The intruder was caught by the security cameras while trying to break into the house.

Conversation

Did you hear about the intruder that got caught in the neighborhood last night?

No way! What happened?

Apparently, the police arrived just in time to catch the intruder.

That’s so scary! I hope they get more security for the area.

Synonyms & Antonyms

Root Explanation

Intruder → It is formed from "in-" (meaning into) and "trudere" (meaning to push or thrust). The word describes someone who pushes into a place where they are not welcome.

Memory Tip

Think of someone 'pushing in' ('trudere') 'into' ('in-') a space where they shouldn't be — that's why an intruder is someone who enters without permission.

Visually Confused Words