"Bears up under" is a phrase that describes the ability to withstand a difficult situation or adversity. Some synonyms for this phrase include enduring, weathering, persevering, surviving, and toughing it out. These words all imply that a person is able to overcome challenges and keep going despite difficult circumstances. Other synonyms for "bears up under" include standing firm, coping, holding out, and soldiering on. These words all suggest resilience and determination in the face of adversity, and they reflect the qualities that enable individuals to succeed and thrive in challenging situations.