秘密裏 ひみつり Also written 秘密裡 Meanings Noun (in) secrecy; behind closed doors (usu. adverbially as 〜に) Kanji 秘 secret. Read as ヒ. 密 dense. Read as ミツ. 裏 behind. Read as リ. Common phrases 秘密裏に行う 秘密裏に進める Jinuma: Japanese Dictionary · Word lists