The antonyms for the word "unrequired" are "needed," "required," "necessary," and "essential." These words indicate a sense of importance and urgency, highlighting the value and relevance of something. While "unrequired" signifies the opposite, suggesting that something is not needed or necessary. In many cases, the antonyms of "unrequired" are used when someone wants to emphasize the significance of a particular action or object. For example, if a person needs to complete a task, they may say that it's required, indicating that it's an essential part of their job. Similarly, if an object has value or importance, it may be described as necessary or needed.