She vowed to 'avenge herself' [=to get revenge], saying she would make him pay for what he had done to her.
The team is out to 'avenge' last week's defeat. [=to defeat the team that they were defeated by last week]
They vowed to 'avenge' their father by capturing and punishing his killer.
(..) that he wanted me to learn at first hand something of the Saxon ways. The landscape, the buildings... and defenses. He said it would be useful when we returned to avenge him. Are you saying he wanted you to be our leader? ~ Look! ~ What? What? Can't you see her? (..)2017 TvShow: Vikings Title: Revenge Season: 4 Episode 18
(..) King Ecbert offered our father up like a sacrifice, so we'll do the same thing to him. We are going to raise an army and avenge the death of our father. I know what your father would have wanted me to do. Lathgertha is building some serious defenses. It doesn't matter (..)2017 TvShow: Vikings Title: Revenge Season: 4 Episode 18