Being at fault is a phrase that describes the responsibility for a mistake or error in judgment. The antonyms for this phrase include being blameless, faultless, innocent, impeccable, and guiltless. These words all describe a state of not being responsible for any wrongdoing, and are often used to describe someone who has been unfairly accused or wrongly blamed for something. It's important to consider these antonyms when assigning blame or responsibility, as they can help ensure that justice is served and that individuals are not unfairly punished for something that was not their fault. Ultimately, being blameless, faultless, innocent, impeccable, and guiltless are all positive states of being that we should strive for in our everyday lives.