Antonyms for the word "callousing" include phrases such as "softening the skin," "tenderizing," or "making vulnerable." These terms suggest an opposite effect to the callusing process, which typically involves thickening and toughening of the skin. Other antonyms could include "sensitivity training," "emotional healing," or "opening up to vulnerability." These phrases connote a different kind of transformation than the physical one brought about by callusing, indicating a conceptual shift towards greater emotional awareness and sensitivity. Overall, antonyms for "callousing" express a counterpoint to the idea of hardening oneself against the world and instead emphasize the potential benefits of becoming more tender and receptive.