The Chinese word **房门 (fángmén)**, meaning "room door," is a compound word formed through the common morphological process of **modifier-head construction**, where the first character **房 (fáng)**, meaning "room," acts as a modifier to specify and restrict the meaning of the second, core character **门 (mén)**, meaning "door." The resulting compound thus semantically identifies a specific type of door—the door that belongs to or leads to a room—demonstrating how Chinese efficiently creates precise terms by combining existing, meaningful monosyllabic morphemes.