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inverted; upside down; reversed; back to front; wrong way round
「倒」 has other readings with different meanings.
写真が倒に貼られていることに気づいた。
I noticed the photo had been put up upside down.
地図を倒に見ていたので道に迷った。
I got lost because I was reading the map upside down.
傘を倒に立てかけて水を切った。
I stood the umbrella upside down to let the water drip off.