The word **俗气** is a compound adjective formed by combining two characters: **俗** (sú), meaning "common," "popular," or "vulgar," and **气** (qì), which in this context means "air," "aura," or "quality." Together, they create a metaphorical meaning where **俗** provides the core concept of being unsophisticated, tacky, or overly conventional, and **气** signifies the pervasive quality or character that exudes from something. Thus, **俗气** describes an object, style, or behavior that possesses a vulgar, tacky, or excessively mundane aura, implying a lack of refinement and good taste.