内 （ナイ） inside, within

内科 （ナイカ） internal medicine, department of internal medicine

島内 （トウナイ） on an island, on-island

校内 （コウナイ） within a school

内裏 （ダイリ） imperial palace, festival dolls representing the emperor and the empress

内府 （ナイフ） Minister of the Interior (669-1868 CE), Lord Keeper of the Privy Seal (1885-1945 CE)

境内 （ケイダイ） grounds (esp. of shrines and temples), compound, churchyard, precincts

海内 （カイダイ） the whole country

内 （うち） inside, within, while (e.g. one is young), during, within (e.g. a day), in the course of, among, amongst, (out) of, between, in (secret, chaos, poverty, etc.), amidst, with (e.g. success), within oneself, one's feelings, inner thoughts, we, our company, our organization, one's home, one's family, my spouse, my husband, my wife, signed on behalf of (husband's name) by his wife, I, me, imperial palace grounds, emperor

内々 （うちうち） private, confidential, informal, secret, (within the) family circle, (on the) inside

幕内 （まくうち） highest-ranking division

幕の内 （まくのうち） box lunch (containing rice and 10-15 small portions of fish, meat, and vegetables), highest-ranking division, intermission (between acts), interlude