快 means “pleasant, comfortable”

かい · kai

Also: cheerful, agreeable

Kun'yomi (Japanese reading)

こころよい

On'yomi (Chinese reading)

カイ

JLPT N2 · Taught in grade 5 · 7 strokes

The story

A heart (忄) with the floodgates open (夬, the gap that breaks in 決): feeling free and easy. 快適 is comfortable, a 快晴 sky has not a single cloud, and a JR 快速 is the rapid train that skips the small stations.

Used in 快適 (kaiteki, comfortable), 快晴 (kaisei, clear skies), and 快速 (kaisoku, rapid service train)

More from Heart & Mind

• 悩 worry
• 珍 rare
• 叫 shout
• 憎 hate
• 肯 affirm
• 依 depend
• 純 pure

Learn 快 and more kanji free on Fuji Learning · All kanji

Readings from KANJIDIC2, © EDRDG, CC BY-SA.