# desu

> English word · Particle · IPA /ˈdɛsuː/ · frequency rank #65,825

## Definitions
1. Used at the end of a sentence as an assertive particle.

## Etymology
Borrowed from Japanese です (desu, “be”), the polite form of the Japanese copula, found most often at the end of a sentence. Know Your Meme attributes its spread to 4chan memes of the Rozen Maiden character Suiseiseki who ends every sentence with desu (see also キャラ語尾).

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