"通胀" is a concise, commonly used noun meaning "inflation" — the general rise in prices and fall in the purchasing value of money over time. The character 通 (tōng) here carries the sense of 'general' or 'widespread', while 胀 (zhàng) literally means 'swelling' or 'expansion', evoking the idea of prices 'swelling' across the economy. Together, they form a vivid, metaphorical compound that mirrors English's 'inflation' (from Latin 'inflare', to blow up).

This term appears frequently in news reports, economic discussions, policy documents, and everyday conversations about cost-of-living changes. It is almost always used as a standalone noun (e.g., 抗通胀, 高通胀), rarely as a verb. While formal in origin, it’s now fully integrated into spoken and written Mandarin — unlike the longer, more technical term 通货膨胀 (tōnghuò péngzhàng), which is its full form but less common in casual contexts.