The word "敌对" (díduì) is formed through the morphological process of compounding, where two independent lexical morphemes, each with its own meaning, are combined to create a new, unified concept. The first character, "敌" (dí), fundamentally means "enemy" or "hostile," while the second, "对" (duì), carries the core meaning of "opposite," "facing," or "mutual." When paired, they semantically merge to express a state or relationship of mutual opposition and hostility, literally translating to "enemy-opposite" and effectively meaning "hostile" or "antagonistic." This formation is typical of modern Chinese, where disyllabic compounds are created for precise expression, with the "modifier + head" structure here indicating a quality (hostility) defined by a reciprocal, facing posture.