You searched for: “unprovoked
unprovoked (adjective) (not comparable)
1. Referring to an attack or a display of aggression or emotion which is not caused by anything done or said: Suddenly Tom displayed a furious and unprovoked outburst of anger, although his friend gave him no reason to respond that way.
2. Relating to something that occurs without motivation or any justification: The news reported that there was an unprovoked attack on a man who was recently walking home from a bus stop in the evening.