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former; ex-; past; one-time
earlier times; the past; previous state
formerly; previously; originally; before
「元」 has other readings with different meanings.
火の元には気を付けてください。
Please be careful with fire sources.
使ったら元の場所に戻した方がいい。
You should return it to its original place.
彼は元プロサッカー選手として活躍していた。
He is a former professional soccer player.