Antonyms for the phrase "learned one's part" could include "unprepared," "ignorant," "unacquainted," or "unfamiliar." These antonyms suggest a lack of readiness or knowledge, implying a potential for mistakes or failure in performing a given task. Alternatively, a person who has not learned their part may be described as "inept," "incompetent," or "inadequate," implying a more severe deficiency in their ability to perform the task. In contrast, a person who has learned their part might be described as "masterful," "capable," or "proficient," suggesting a high degree of competence and skill in their performance.
