The antonyms for the word "dis-advantageous" are numerous and varied. One antonym could be "beneficial," meaning advantageous or helpful. Another could be "favorable," meaning advantageous or conducive to success. Still another antonym could be "prosperous," meaning financially or otherwise successful. Other possible antonyms might include "advantageous," "helpful," "positive," or "advantageous." Ultimately, the choice of antonym will depend on the specific context and intended meaning of the word "dis-advantageous." Whatever the antonym may be, the important thing is to choose a word that conveys the opposite of "dis-advantageous" accurately and effectively.