"Trained off" is a phrase that refers to something gradually diminishing or fading away. Its antonyms, on the other hand, are words that indicate an increase, intensification or persistence. Words that can be used as antonyms for trained off include "escalate," "rise," "surge," "persist," and "strengthen." For example, instead of saying that the rain "trained off," one could say that it "surged" or "intensified." Similarly, instead of saying that a person's interest in a particular topic has "trained off," one could say that it has "persisted" or "re-energized." Antonyms for "trained off" provide alternate ways to express growth, continuity, or escalation in a particular context.