Discontinued means to come to an end or to be stopped. Therefore, the antonyms for discontinued would be words that express continuity or ongoing. One antonym for discontinued could be "continuous," which means without interruption or ceaseless. Another antonym could be "uninterrupted," meaning not broken or altered. Additionally, "constant" or "perpetual" could also be antonyms for discontinued, as they both imply a continuing existence or persistent presence. Other antonyms could be "unceasing," "endless," "infinite," or "eternal," all of which convey the idea of something that goes on perpetually without cessation.