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inverted; upside down; reversed; back to front; wrong way round
写真を逆さまに飾っていることに気づいた。
I noticed that the photo was hung upside down.
逆さまに持った傘から水が流れ落ちた。
Water dripped from the umbrella held upside down.
彼の説明は順序が逆さまで分かりにくかった。
His explanation was in reverse order and hard to follow.