A doublet is a pair of related words that came from the same origin.
doublet(同源异形词)指一对源自同一词源、但形式或意义有所分化的相关词。
In English, “shirt” and “skirt” are often cited as a doublet, since they share the same root but entered the language through different routes.
在英语里,“shirt”和“skirt”常被视为一组doublet,因为它们同源但通过不同路径进入英语,因而形成不同词形与意义。