The word "is convulsed" refers to a state of uncontrollable shaking or trembling. Opposites for this phrase could include being still, stable, or steady. Other possible antonyms could be serene, calm, or peaceful. Antonyms for "convulsed" could also refer to emotional states, such as being composed, tranquil, or relaxed. Some other possible antonyms might include words such as collected, controlled, or balanced. In general, antonyms for "is convulsed" could refer to a state of calmness or stability, where there is no shaking or trembling, no emotional upheaval, and no signs of distress or agitation.