Is it ensure, insure, or assure?
also milk-toast, "toast softened in milk," 1831, from milk (n.) + toast (n.). Figurative of softness or innocence by 1859.
A mild, ineffectual person; a timid person; wimp
[1924+; fr or popularized by the comic-strip character Caspar Milquetoast in ''The Timid Soul'' by H T Webster]