The word **限度** (xiàndù) is a compound noun formed by combining two meaningful characters: **限** (xiàn), which means "limit," "restriction," or "boundary," and **度** (dù), which means "degree," "extent," or "measure." Together, they create a single concept where **限** provides the core idea of a boundary or cap, and **度** specifies that this boundary is quantitative or qualitative in nature, referring to the permissible or maximum extent of something. Thus, the compound literally and semantically means "a limited degree" or "a point of restriction," conveying the idea of a defined limit, boundary, or ceiling (e.g., speed limit, tolerance limit).