liberator

/ˈlɪbəˌreɪtər/
noun
  1. A person who sets someone or something free from imprisonment, slavery, or oppression.
    • She saw the lawyer as her liberator from an unfair contract.
    • In history books, he is remembered as a liberator of enslaved people.
    • The general was hailed as a liberator after driving out the invaders.
What does "liberator" mean? | whatsthatwordmean | whatsthatwordmean