1. done without being caused or triggered by something else; without justification or reason

Examples

• The unprovoked attack shocked the entire community.
• She launched into an unprovoked verbal assault on her coworker.
• The dog’s unprovoked aggression concerned the veterinarian.
• His unprovoked laughter during the serious meeting was inappropriate.
• The unprovoked invasion violated international law.
• Police are investigating the unprovoked assault in the park.
• Her unprovoked anger seemed to come out of nowhere.