The compound word **陪同** (péitóng) is formed through the combination of two semantically related characters: **陪** (péi), which means "to accompany" or "to keep someone company," and **同** (tóng), which means "together" or "same." In this **coordinated verb** structure, the first character **陪** provides the core action of accompanying, while the second character **同** reinforces the notion of joint participation or shared activity. Together, they create a single verb that means "to accompany" or "to be in the company of," with a nuance of doing something alongside another person, making it more specific and formal than either character alone.