The Chinese word **岩浆 (yánjiāng)** for "magma" is a semantically transparent compound formed by combining two characters: **岩 (yán)**, meaning "rock," and **浆 (jiāng)**, meaning "thick fluid" or "paste." The term is constructed through a direct and logical semantic synthesis, where the first character defines the material's solid-state origin (rock) and the second character describes its melted, viscous state. This creates a precise, descriptive noun that effectively conveys the concept of molten rock material found beneath the Earth's crust, exemplifying a common method in Chinese word formation where two meaningful morphemes are joined to produce a new, compound meaning.