Examining covert gender words, in which sexist mentality deeply hides, may more profoundly expose a culture's view on the two sexes. This paper, from a feminist perspective, comparatively studies covert gender words in Chinese and Japanese, aims to discover how masculinity and prejudice against the female sex became covertly accepted in the two languages, and tries to explain how such linguistic phenomenon influences aesthetics in the two cultures and to compare their causes and difference.