The Chinese word 互动 (hùdòng), meaning "interaction" or "to interact", is a modern compound formed by combining two meaningful characters: 互 (hù), which means "mutual" or "each other", and 动 (dòng), which means "to move" or "to act". Literally, the term conveys the idea of "mutual action" or "acting upon each other", effectively capturing the bidirectional, dynamic exchange inherent in the concept of interaction, whether between people, systems, or ideas. This formation follows the common Chinese linguistic pattern of creating new terms by logically combining existing characters to express a composite or abstract meaning.