The word **肿胀 (zhǒngzhàng)** is a typical example of a Chinese **binom** or **compound word** formed by the combination of two semantically similar characters, each containing the **"flesh" radical (月)**, which indicates its meaning is related to the body. The first character, **肿 (zhǒng)**, specifically means "swelling" or "to swell," while the second, **胀 (zhàng)**, means "distension" or "to expand." When paired, they reinforce and complement each other to create a single, more vivid and comprehensive term meaning "swollen and distended," effectively describing the physical state of inflammation or bloating. This formation follows the common Chinese lexical pattern of **synonym compounding**, where two near-synonyms unite to express a unified, nuanced concept.