nvi. Cavity, hollow, rut, depression; armpit; hollow at the juncture of the wing with the body of a fowl; to sink, go down, set (of the sun), to enter or sink into out of sight. Cf. poʻo, depression. Ua napoʻo ka lā, the sun has set. Ua napoʻo ka ʻiole i loko o ka lua, the rat has gone down the hole.