mouth-organ

n (also harmonica) small musical instrument played by passing it along the lips while blowing or sucking air 口琴.

mountainside, mountebank, mounted, Mountie, mounting, mourn, mourner, mournful, mournfully, mournfulness, mourning, mouse, mouser, mousetrap, moussaka, mousse, Moussorgsky, moustache, mousy, mouth, mouth-to-mouth, mouthful, mouthpiece, mouthwash, mouthwatering, movable, movables, move, move about, move ahead, move in, move off, move on, movement, movie, movie-goer, moving, moving picture, mow, mower,