敌对 (dí duì) is an adjective meaning 'hostile' or 'antagonistic', describing a relationship or attitude characterized by opposition, enmity, or active resistance. The first character 敌 (dí) means 'enemy' or 'foe', carrying connotations of threat and conflict; the second character 对 (duì) means 'toward', 'against', or 'in relation to', so together they literally convey 'directed against an enemy' — emphasizing mutual, often institutionalized or sustained hostility.

This word is commonly used in formal, political, social, or interpersonal contexts — for example, describing relations between nations, rival companies, opposing groups, or deeply conflicted individuals. It implies more than mere disagreement: it suggests entrenched opposition, sometimes with historical roots or systemic causes. While it can describe feelings, it’s more frequently applied to relationships, policies, or stances rather than fleeting emotions like anger or annoyance.