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the opposite direction; the other way
逆方向の電車に乗った。
I got on a train going in the opposite direction.
逆方向に進んでいることに気づいた。
I realized I was heading in the opposite direction.
地図を見たら、逆方向に一時間も歩いていた。
When I checked the map, I realized we had been walking in the opposite direction for an hour.