1) 口外こうがい #13,132 Inflections of 口外 Class Suru verb Stem Inflected ending ✕ Link copied! こうがい [0] Meaning Shirabe Noun Suru verb Transitive verb revealing (information, a secret, etc.); disclosure; telling; letting out この事ことは絶対ぜったいに口外こうがいしません。 I'll never tell this to anyone. Kanji 口 コウ mouth 外 ガイ outside Forms 口外#13,132口外こうがいこうがいこうがい Learn this word with smart reviews that adapt to you Save word