aggressor

Definitions

A person or country that attacks another first.

One who initiates a conflict, quarrel, or act of hostility.

Examples

The police report identified the man as the primary aggressor in the physical altercation.

In international law, the nation that initiates an unprovoked attack is considered the aggressor.

Synonyms

attacker assailant invader offender provoker assaultant belligerent

Antonyms

defender protector ally peacemaker guardian supporter victim