An aversion to food, a deep-seated dislike or repugnance that makes eating distressing rather than merely unappealing. The term comes from older medical vocabulary describing patients who turned from food with disgust, whether from disease, pregnancy-related nausea, medication effects, or psychological disturbance. Modern clinicians encountering food aversion investigate its roots: altered taste and smell from illness or treatment, conditioned nausea after food poisoning, depression’s blunting of appetite, or the gastrointestinal disorders that teach patients to fear eating. Managing it requires treating the cause while protecting nutrition, since prolonged aversion leads to weight loss and deficiency. The word itself has largely vanished from practice, but the suffering it named remains a daily challenge in oncology, palliative care, and eating disorder treatment.