The term "de mission" refers to the act of dismissing or releasing someone from a duty, task, or responsibility. Some antonyms for this word include appoint, charge, command, employ, engage, enjoin, hire, instruct, retain, and task. These words all convey the opposite meaning of de mission, indicating that one is being given a responsibility, task, or duty rather than being released from it. It is important to understand the context in which these words are used to communicate effectively and avoid confusion. Knowing these antonyms can help when discussing work assignments, projects, or duties with colleagues or superiors.