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by nature; by birth; naturally; natural; innate
彼女は生まれつき耳が聞こえないが音楽を愛している。
She has been deaf from birth but loves music.
生まれつきの才能だけでなく努力も必要だ。
Not only innate talent but also effort is needed.
彼は生まれつき体が丈夫で病気をしたことがない。
He has been naturally robust since birth and has never been sick.