# sneak up

> English word · Verb

## Definitions
1. To approach a person or animal without being seen or heard
2. To deliver a sudden effect, often unexpectedly and without warning.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sneak-up