As a Noun: 1. An unfriendly feeling towards someone because they have upset you or harmed you in the past. English = grudge. 2. The act of hurting or doing something bad to someone who has hurt or harmed you in some way before. English = revenge, vengeance. As a Verb or Adjective: 1. To have an unfriendly feeling towards someone because they have upset you or harmed you in the past; to bear a grudge; have it in for someone. 2. To hurt or do something bad to someone who has hurt or harmed you in some way before. English = revenge yourself, get revenge, avenge. Idiomatic English = get back at someone, get one's own back.