mystery
Please log in to see your next review.
Please log in to see your progress.
その事件にはまだ多くの謎が残っている。
Many mysteries still remain in that case.
彼の過去は謎に包まれている。
His past is shrouded in mystery.
この遺跡の用途は今も謎だ。
The purpose of these ruins is still a mystery.