The phrase "putting out of action" refers to rendering something or someone unable to perform its usual function or activity. The antonyms of this phrase are the opposite or reverse of it, which means enabling, restoring, or activating someone or something. The antonyms for "putting out of action" are "reenergizing," "repairing," "reactivating," "restoring," "fixing," or "revitalizing." For example, instead of putting a damaged machine out of action, it can be repaired or restored to its working order. Similarly, a person who is exhausted or feeling sick can be reenergized or revitalized through rest or medical treatment to resume their regular activities.