Jōyō kanji, Taught in junior high
JLPT level: N1
1776 of 2500 most used kanji in newspapers
Stroke count: 11
Meaning: plug up, obstruct
Kunyomi:
Onyomi: チツ
Composition: 穴 至
Radical: 穴
Meaning: cave
Reading: あな
Frequency: 298
Alternative forms:
脱窒 (ダッチツ) denitrification, denitration