The opposite of "are convulsed" can be expressed in a variety of antonyms depending on the specific context. For example, "are still" could be one antonym for a sentence like, "The room and its occupants are convulsed with laughter." Alternatively, "are peaceful" might be an antonym for a sentence like, "Her body is convulsed with anxiety." Other possible antonyms for "are convulsed" might include "are relaxed," "are calm," "are tranquil," or "are unaffected." Ultimately, the best antonym for "are convulsed" will depend on the specific situation and the intended meaning.