avenge 
/əˈvɛnʤ/ verb
aveng·es; avenged; aveng·ing /əˈvɛnʤ/ verb [+ obj] : to harm or punish someone who has harmed you or someone or something that you care about
▪ The brothers vowed to avenge the death of their father. ▪ They vowed to avenge their father by capturing and punishing his killer. ▪ The team is out to avenge last week's defeat. [=to defeat the team that they were defeated by last week] ▪ She vowed to avenge herself [=to get revenge], saying she would make him pay for what he had done to her.
▪ The brothers vowed to avenge the death of their father. ▪ They vowed to avenge their father by capturing and punishing his killer. ▪ The team is out to avenge last week's defeat. [=to defeat the team that they were defeated by last week] ▪ She vowed to avenge herself [=to get revenge], saying she would make him pay for what he had done to her.
— aveng·er noun, plural aveng·ers [count]
▪ the avengers of those who had been killed
▪ the avengers of those who had been killed
— avenging adjective
▪ saw herself as an avenging angel
▪ saw herself as an avenging angel
