somnambulism

n [U] (fml 文) activity or habit of walking in one's sleep; sleep-walking 梦行（症）; 梦游.

sombre (US somber), sombrely, sombreness, sombrero, some, somebody, someday, somehow, someone, someplace, somersault, something, something else, something like, something of, sometime, sometimes, someway, somewhat, somewhere, somnambulist, somnolence, somnolent, somnolently, son, son et lumiere, son-in-law, sonar, sonata, song, song-book, songbird, songster, songstress, songwriter, sonic, sonic barrier, sonic boom, sonnet, sonny,