The term "unburdening" means to relieve oneself of a burden or to free oneself from something that is weighing heavily on one's mind. Some antonyms for this term would include "burdening," "weighing down," and "oppressing." These words suggest a sense of weight, heaviness, or difficulty that is associated with carrying a burden. Other antonyms could include "holding onto," "stressing," and "struggling with." These words evoke negative feelings and emotions that are associated with carrying a burden, such as stress, anxiety, and depression. Ultimately, while "unburdening" brings relief and freedom, its antonyms suggest difficulty and struggle.