Being constant is characterized by a continuous, unwavering state or behavior. The antonyms for being constant are sporadic, erratic, and inconsistent. Sporadic means intermittent or occurring irregularly. Erratic refers to being unpredictable and irregular in behavior. Inconsistent means that something is not uniform in its behavior or quality. These antonyms imply that there is a lack of stability or reliability in such behaviors or states. If someone is not being constant, it can affect their ability to establish trust and maintain steady relationships. Therefore, it is essential to strive for consistency in our actions and attitudes towards others.