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to eat
to live on (e.g. a salary); to live off; to subsist on
朝ごはんはもう食べた?
Have you already eaten breakfast?
年金だけで食べていくのは大変だ。
Living on just a pension is tough.
初めて寿司を食べたのは五歳の時だ。
The first time I ate sushi was when I was five.