Jisho

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Noun
1. locked room
Noun
2. secret room
Wikipedia definition
3. Secret passageSecret passages, also commonly referred to as hidden passages or secret tunnels, are hidden routes used for stealthy travel. Such passageways are sometimes inside buildings leading to secret rooms. Others allow occupants to enter or exit buildings without being seen. Hidden rooms have helped people evade capture, smuggle goods, or carry out illegal activities.
Read “Secret passage” on English Wikipedia
Read “密室” on Japanese Wikipedia
Read “Secret passage” on DBpedia

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