The Chinese word **气温** (qìwēn), meaning "air temperature," is a compound noun formed through semantic combination. It consists of two characters: **气** (qì), which in this context means "air" or "atmosphere," and **温** (wēn), which means "warmth" or "temperature." Together, they create a precise term where the first character specifies the medium (the air) and the second character specifies the property being measured (temperature), following a common modifier-head structure in Chinese where the modifying element (**气**) comes first to define the type of **温** being discussed.