The phrase "doing the trick" typically refers to something that is effective or successful in solving a problem or achieving a desired result. Antonyms for this phrase could include "failing," "unsuccessful," "ineffective," "useless," or "unproductive." These words indicate the opposite of achieving success or meeting a desired outcome. In situations where something is not "doing the trick," it may require more effort or a different approach to achieve success. It is important to consider antonyms for common phrases and expressions to expand one's vocabulary and communication skills.