Unconsequential is often used to refer to something that is insignificant or insignificant. However, there are many antonyms that can be used to describe things that are important or significant. Some of these antonyms include consequential, significant, important, valuable, and meaningful. These antonyms signify the importance of the subject matter or event and indicate that it has a real impact or significance. By using these antonyms, we can change the tone of the sentence to reflect the true importance of the subject matter or event. It is important to choose the correct antonym based on the context of the sentence to ensure that the reader fully understands the intended meaning.