The term "bear under" refers to the feeling of enduring a certain degree of difficulty or burden. Antonyms for this phrase could include "overcome," "triumph," or "prevail." If someone is able to overcome the challenges they are facing, they are no longer bearing under them. They have risen above and conquered them. Similarly, if they triumphed over their struggles, they have achieved victory. Lastly, if they prevailed against their obstacles, they have succeeded in attaining their goals. These antonyms provide a sense of hope and motivation to those who are struggling to bear under their hardships.