To liberate something means to release it from confinement. As the saying goes, "If you love something, set it free," — liberate it.
Liberate is a powerful verb he verb that has been an important part of the history of the United States. In the Revolutionary War we fought to liberate ourselves from Great Britain, and the Civil War was fought in part to liberate the Southern slaves. As recently as the 1920's, women sought to be liberated from second-class citizen status. Even today, there are rebel groups in foreign countries striving to liberate their people who are denied freedom by their governments.