The Chinese word **屏蔽** (píng bì) is a compound formed by combining two characters with related meanings: **屏** originally denotes a "screen" or "partition" used to block a view, while **蔽** means "to cover," "to hide," or "to obstruct." Together, they create a metaphorical and functional meaning of "to shield" or "to block," where **屏** provides the image of a physical barrier and **蔽** adds the action of covering or concealing. Over time, this compound has extended from physical shielding (like a screen blocking wind) to abstract and technical contexts, most commonly referring to blocking signals (e.g., signal jamming) or censoring information online. Thus, the formation follows a typical Chinese lexical pattern where two synonymous or complementary morphemes combine to refine and intensify a shared concept.