ないこう 内攻 LinksSentence search for 内攻Sentence search for ないこうKanji details for 内 and 攻Edit in JMdict Noun, Suru verb, Intransitive verb1. retrocession; (disease) settling in the internal organsMedicineNoun, Suru verb, Intransitive verb2. becoming pent-up (of emotions); accumulation (of anger, frustration, etc.); internalization Discussions Log in to talk about this word.