(intransitive, construed with on) To commit the first act of hostility or offense against; to begin a quarrel or controversy with; to make an attack against.
“I just wanted to make sure that no one aggresses against my boys.”
“When someone, A, is using something and someone else, B, comes along and grabs it from A, probably whopping him with his cudgel in the process, B invades and aggresses.”
aggros
Third-person singular simple present indicative form of aggro