The Chinese word **相貌 (xiàngmào)**, meaning "facial features" or "looks," is a **compound noun formed by combining two characters with closely related meanings**. The first character, **相 (xiàng)**, primarily conveys the concept of outward form, appearance, or portrait. The second character, **貌 (mào)**, specifically denotes facial countenance, appearance, or looks. Together in a **coordinating (or synonymous) compound structure**, they reinforce and refine each other's meaning, creating a single, more nuanced term that specifically emphasizes the visual appearance and structure of a person's face. This is a classic example of how Chinese frequently builds vocabulary by pairing semantically similar characters to form a precise and cohesive concept.