sound a warning

发出警告

sottish, sotto voce, sou, souffle, sough, sought, soul, soul brother (fem 阴性作 `soul sister), soul food, soul mate, soul music, soul-destroying, soul-searching, soul-stirring, soulful, soulfully, soulfulness, soulless, soullessly, sound, sound archives, sound barrier (also sonic barrier), sound effect, sound-proof, sound-recording, sound-track, sound-wave, sounding, sounding-board, soundings, soundless, soundlessly, soundly, soundness, sounds, soup, soup-kitchen, soup-plate, soupcon, sour,