The term "break record" is often used to describe an achievement or accomplishment that surpasses a previous performance. Antonyms for this expression could include "fail to surpass," "lag behind," or "underperform." These terms are used to describe a situation where a previous record has not been surpassed or a goal was not achieved. Other antonyms for break record could also include "fall short," "miss the mark," or "come up short." All of these phrases suggest that an intended result was not achieved or a previous record was not surpassed, and can be used to describe the opposite of "breaking a record.