The phrase "put its end" implies the act of concluding, completing or finishing something. Some antonyms for this phrase are "begin," "start," "commence," "initiate," and "launch." These words signify the opposite of ending, which is to begin or start something new. Other antonyms could be "prolong," "continue," "persevere," "extend," or "stretch out." These words suggest a lack of closure or finality and instead indicate an ongoing, indefinite or unfinished action. Whether it is a personal project, a work task or a life milestone, identifying the right antonym for "put its end" can help determine the most suitable course of action.