aggressor

This term carries a strong negative connotation, framing the subject as the primary instigator of conflict. In geopolitical contexts, it identifies the party that violates international law or borders, shifting the moral burden of the conflict entirely onto the initiator. It is frequently used in legal and diplomatic discourse to justify defensive actions by the victim.

In interpersonal settings, the word describes someone who initiates hostility or bullying. It distinguishes the active attacker from the passive recipient of aggression, often used in psychological or behavioral reports to analyze the dynamics of a confrontation.