蓋 Character

Start with a lid or covering; the language and neighboring words choose the sense. In Mandarin, 蓋 is gài, roughly “guy” with falling pitch: a lid or canopy, covering something, stamping it, or building. Japanese uses 蓋 for ふた (roughly “foo-tah,” a lid) and ガイ (“guy”) in compounds; Korean uses it as Hanja—Chinese characters read in Korean—in compounds about covering or enclosure.

Early forms appear on bronze inscriptions—writing cast on ritual vessels—and in manuscripts from Chu, an ancient Chinese state, and seal script, a formal early script. Chinese etymological dictionaries analyze 蓋 as 艸, the grass or plant component, plus 盍, linking it to a grass or reed cover. 盍 itself could function in classical Chinese as a particle meaning “why not.” A Japanese dictionary cites a ふた (“lid”) example from around 810.

How does 蓋 work in Chinese, Japanese, and Korean?

The words around 蓋 show which action or image is meant. Chinese 蓋章 means to stamp a document or mark it with an official seal; 蓋棺論定 uses a closed coffin as an image for a final judgment.

On Chinese forums, 盖楼 means adding replies as though each one builds another floor; this usage is described in a Chinese-language account from 2019. Japanese compounds use 蓋 for canopies and the roof of the mouth; Korean Hanja compounds include 覆蓋 (covering or overlay) and 口蓋 (the roof of the mouth).

Why does 蓋 sometimes look like 盖?

蓋 is the traditional Chinese form; 盖 is its simplified counterpart. Both represent the same Chinese character in different written forms, while Japanese continues to use 蓋. A Chinese input method’s script setting determines which form it offers.