内々
うちうち- 1private ; confidential ; informal ; secret ; (within the) family circle ; (on the) inside Translated by Jiyomi
Other writings and readings
内内ないない
nouns which may take the genitive case particle 'no' · adverb (fukushi) · noun (common) (futsuumeishi)
JMdict entry 1582450 · frequency rank 22. Source and licence.