JMdict: 1626620

秘中の秘 【ひちゅうのひ】

  1. [exp,n] top secret
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
Secret, Conceal ひ.める, ひそ.か, かく.す
In, Inside, Middle, Mean, Center ちゅう なか, うち, あた.る