Jisho

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Expressions (phrases, clauses, etc.)
1. being fast asleep (and totally unaware of what is going on around one)Yojijukugo (four character compound)
Expressions (phrases, clauses, etc.)
2. know-it-all manner
Other forms
白河夜船 【しらかわよぶね】白川夜船 【しらかわよふね】白川夜船 【しらかわよぶね】白河夜舟 【しらかわよふね】白河夜舟 【しらかわよぶね】白川夜舟 【しらかわよふね】白川夜舟 【しらかわよぶね】

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