Effect
Result, Worth
noun
かい
甲斐 (かい) Effect, Result, Worth
甲斐性 (かいしょう) Resourcefulness, Competence
生き甲斐 (いきがい) Reason For Living, Something Worth Living For
やり甲斐 (やりがい) Worth Doing
結果 (けっか) Result
効果 (こうか) An Effect, Effect
価値 (かち) Value, Worth, Merit
Kayaking かい is Worth a lot to him.