The word **气泡 (qìpào)**, meaning "bubble" (as in a gas-filled sphere in a liquid or solid), is a semantically transparent compound noun formed by combining two meaningful characters: **气 (qì)**, meaning "air" or "gas," and **泡 (pào)**, meaning "bubble" or "blister." It follows a common modifier-head structure in Chinese morphology, where the first character **气** specifies the type or content ("gas"), and the second character **泡** denotes the core object or form ("bubble"). Thus, the compound literally and logically means a "gas-bubble," efficiently creating a precise term through the straightforward combination of its constituent morphemes.