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reason for living; something one lives for; purpose in life; raison d'être; ikigai
孫の成長を見守ることが祖母の生き甲斐だ。
Watching her grandchildren grow is grandmother's purpose in life.
彼は仕事に生き甲斐を感じている人だ。
He is someone who finds purpose in his work.
新しい趣味を見つけて生き甲斐ができた。
Finding a new hobby gave me a reason to live.