敌人 (dí rén) literally combines 敌 (dí), meaning 'hostile' or 'opposing', and 人 (rén), meaning 'person'. Together, it means 'enemy' — a person or group that is actively opposed to, in conflict with, or threatening another person, group, or nation. Unlike the English word 'enemy', which can sometimes be used figuratively (e.g., 'the enemy of progress'), 敌人 in Chinese almost always implies real, intentional opposition — often in political, military, or interpersonal conflict contexts.

The term carries strong negative connotations and is rarely used lightly in daily speech; it’s more common in formal writing, historical narratives, news reports about conflict, or dramatic dialogue. It does not refer to competitors in games or sports (for which you’d use 对手 duìshǒu), nor to abstract obstacles (e.g., 'enemy of time'). While historically tied to warfare, modern usage extends to ideological, social, or personal antagonism — but always with clear intent and hostility.