健 healthy

(personleft) + 建 (build) Same-ON

★★★★☆

11 strokes

I've never seen this kanji outside of the 健康 jukugo - so maybe study the jukugo instead of learning the kanji separately.

Onyomi

KEN

Health builds a person!

健康(けんこう)

health ★★★★☆
健 (healthy) + 康 (health) = 健康 (health)