口こう内ないTop 20000MeaningsNo-adjectiveNoun1. oral; in the mouthOther spellings咥内こうない<1%Kanji used口mouth内insideKanji in other spellings咥laughPitch accentこうないUsed in vocabulary口こう内ない炎えんmouth ulcer; stomatitisNoun口こう内ない性せい交こうoral sex; fellatioNoun口こう内ない丼どんmixing rice and side dishes in one's mouthNoun