The term "potential verb" usually refers to a type of verb that expresses possibility or ability, such as "can," "could," "may," or "might." The antonyms for this term can be words that express negation or prohibition, such as "cannot," "must not," "shall not," or "should not." These are verbs that indicate an inability or lack of permission to perform a particular action. Another set of antonyms for potential verbs could be words that express certainty or inevitability, such as "will," "must," "shall," or "have to." These are verbs that indicate a strong necessity or obligation to do something or that an action is bound to happen.