aggressor

/əˈɡrɛsər/
noun
  1. A person or country that starts a fight, attack, or war.
    • In the conflict, the aggressor was the nation that invaded first.
    • History books often label the aggressor in a war as the one who started it.
    • The school counselor talked to the aggressor about the bullying incident.
What does "aggressor" mean? | whatsthatwordmean | whatsthatwordmean