has occurrent part emotion process disgust disgusted Disgust is thought to have evolved to guard the body against dangerous foods and microbial infections. This basic physiological disgust has also culturally evolved to incorporate both moral and interpersonal disgust which protect the self from social threats. A negative emotion that is characterised by a need to get rid of, or distance oneself from, a stimulus that is appraised as repulsing. ekel asco dégoût negative valence