噤若寒蝉的英语:keep silent like a cicada in cold weather; be as quiet [silent] as cicadas in late autumn; be as silent as a cold cicada; be as silent as a winter cicada; become silent as an autumn cicada...
噤若寒蝉的法语:muet comme une cigale engourdie par le froid;n'oser souffler mot;garder le mutisme par crainte