# 窒 — nitrogen; plug up

窒 means “nitrogen; plug up”. It is a JLPT N1 kanji written with 11 strokes. On'yomi: チツ (chitsu). It has no common kun'yomi.

- Meaning: nitrogen; plug up
- On'yomi: チツ (chitsu)
- Kun'yomi: —
- Strokes: 11
- Level: JLPT N1 · set Metal, stone & materials 2

## How to remember 窒

Parts: 穴 hole · 至 reach

## Don't confuse it with

[室](https://moji.ninja/n4-kanji/room/) · [窓](https://moji.ninja/n2-kanji/window/)

## More in the “Metal, stone & materials 2” set

[珠](https://moji.ninja/n1-kanji/pearl/) · [窒](https://moji.ninja/n1-kanji/nitrogen/) · [鍛](https://moji.ninja/n1-kanji/forge/) · [硫](https://moji.ninja/n1-kanji/sulphur/) · [漆](https://moji.ninja/n1-kanji/lacquer/) · [鋳](https://moji.ninja/n1-kanji/cast-metal/)

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From Moji Ninja (https://moji.ninja/), a free app for learning hiragana, katakana and the JLPT kanji from N5 to N1 with spaced repetition. Page: https://moji.ninja/n1-kanji/nitrogen/. Last updated 2026-11-01.