Untreatable refers to a medical condition or disease that cannot be cured or controlled by medical intervention or treatment. Synonyms for the term "untreatable" include incurable, uncontrollable, unmanageable, irremediable, irreparable, irreversible, and fatal. These terms describe the severity of the medical situation and imply that there are very few medical options or interventions available for improving or addressing the condition. Similarly, these synonyms also suggest the need for palliative care or symptom management, rather than any active effort towards curing or eliminating the disease. Overall, the synonyms for untreatable point to the grim reality of medical conditions where the prospects for a complete recovery are very low.