unprovoked
adjective
un·pro·voked ˌən-prə-ˈvōkt 
: occurring without any identifiable cause or justification : not provoked
an unprovoked assault/attack
unprovoked anger
Example Sentences
Recent Examples on the Web China has refused to condemn the unprovoked invasion, and increased its trade with Russia to record levels as the Kremlin scrambles to offset the impact of Western sanctions. 
Harold Maass, The Week, 16 Sep. 2022 There was only one surprise in the vote tally for a United Nations General Assembly resolution in March condemning Russia’s unprovoked invasion of Ukraine. Steve Walker, The Atlantic, 5 Sep. 2022 Reading all this barely six months after the bloody, unprovoked Russian invasion of Ukraine can give the reader a bad case of cognitive dissonance. Edward Kosner, WSJ, 25 Aug. 2022 And Ukrainians launched their investigations pretty much within the first week of this unprovoked invasion by Russia. Taylor Wilson, USA TODAY, 25 Aug. 2022 Top Stories Since February, the world has watched Russia’s unprovoked invasion of Ukraine with horror. Rick Scott, National Review, 4 Aug. 2022 The country has been ravaged by violence and destruction since the unprovoked invasion of Russian forces began earlier this year. Fox News, 23 July 2022 Preempting critiques of oligarchical entanglements, BP, Shell, and Exxon wrote down billions of dollars immediately after the outbreak of Russia’s unprovoked bloody assault on the sovereign Ukraine nation. Georgia Hirsty, Fortune, 30 June 2022 Jonathan Eyal, an associate director at the Royal United Services Institute, a London think tank, said these developments were prompted by a sense of alarm in Europe at seeing the Kremlin launch an unprovoked assault on a sovereign democracy. Alexander Smith, NBC News, 29 June 2022 See More
Harold Maass, The Week, 16 Sep. 2022 There was only one surprise in the vote tally for a United Nations General Assembly resolution in March condemning Russia’s unprovoked invasion of Ukraine. Steve Walker, The Atlantic, 5 Sep. 2022 Reading all this barely six months after the bloody, unprovoked Russian invasion of Ukraine can give the reader a bad case of cognitive dissonance. Edward Kosner, WSJ, 25 Aug. 2022 And Ukrainians launched their investigations pretty much within the first week of this unprovoked invasion by Russia. Taylor Wilson, USA TODAY, 25 Aug. 2022 Top Stories Since February, the world has watched Russia’s unprovoked invasion of Ukraine with horror. Rick Scott, National Review, 4 Aug. 2022 The country has been ravaged by violence and destruction since the unprovoked invasion of Russian forces began earlier this year. Fox News, 23 July 2022 Preempting critiques of oligarchical entanglements, BP, Shell, and Exxon wrote down billions of dollars immediately after the outbreak of Russia’s unprovoked bloody assault on the sovereign Ukraine nation. Georgia Hirsty, Fortune, 30 June 2022 Jonathan Eyal, an associate director at the Royal United Services Institute, a London think tank, said these developments were prompted by a sense of alarm in Europe at seeing the Kremlin launch an unprovoked assault on a sovereign democracy. Alexander Smith, NBC News, 29 June 2022 See More Word History
First Known Use
1534, in the meaning defined above