Is it ensure, insure, or assure?
representation of cat sound, 1842, earlier miaow, miau, meaw (1630s). Of imitative origin, cf. French miaou, German miauen, Persian maw, Japanese nya nya, Arabic nau-nau, and Joyce's mrkgnao. In Chinese, miau means "cat." As a verb by 1630s, meaw, also meawle. Cf. Old French miauer "to meow, caterwaul." Related: Meowed; meowing.