11 strokes
窒素
chisso
nitrogen
窒息
chissoku
suffocation; asphyxiation
窒扶斯
chifusu
typhoid fever
Study kanji on LenGaki

Get the Android app
The app adds offline study, home-screen widgets, stroke-order tracing, speaking practice with pronunciation scoring, and an AI tutor that answers questions in context — none of which fits in a browser tab.