冰冻 (bīng dòng) is an adjective meaning 'frozen' or 'ice-bound', describing something that has turned to ice due to extremely low temperatures. The first character, 冰 (bīng), means 'ice'; the second, 冻 (dòng), means 'to freeze' or 'frost'. Together, they form a compound emphasizing the state of being solidified by cold — not just cold, but actually frozen solid. It’s commonly used to describe natural phenomena (e.g., rivers, lakes, soil), food storage ('frozen food'), and biological contexts where freezing affects living things.

This word often appears in scientific, agricultural, or ecological discussions — for instance, when describing how winter conditions impact wildlife habitats or livestock management. While it can be used attributively (e.g., 冰冻的湖面), it also functions predicatively (e.g., 湖面已经冰冻了). Unlike 冷 (lěng, 'cold') or 结冰 (jié bīng, 'to freeze over'), 冰冻 emphasizes the resulting hardened, icy state rather than the process or sensation of cold.