快

ONかい

KUNこころよ

Meanings

pleasantcomfortablecheerful

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How to remember

'Kai' — Imagine you're feeling so pleasant and comfortable that you let out a happy sigh: 'Ahh... KAI!'

快適かいてき

comfortable, pleasant

快晴かいせい

clear weather, fine weather

快いこころよい

pleasant, agreeable (adjective)

愉快ゆかい

pleasant, happy, cheerful

快速かいそく

rapid, high-speed (e.g., train)