Un-susceptibilities are the lack of susceptibility or vulnerability to certain stimuli or experiences. Synonyms for this term include resistance, immunity, and imperviousness. Whether it is a resistance to disease, immunity to criticism, or imperviousness to the effects of stress, individuals may exhibit different un-susceptibilities based on their biology, environment, and past experiences. Other synonyms for un-susceptibilities may include insusceptibility, resilience, and fortitude. Recognizing and harnessing these un-susceptibilities can enable individuals to better navigate challenges and succeed in various aspects of life.