The phrase "subject to euthanasia" refers to individuals who are facing the difficult decision of ending their lives due to an incurable illness or unbearable suffering. Some synonyms for this term include "terminally ill," "suicidal," "palliative," "mercy killing," and "end-of-life care." Each of these phrases suggests that the individual is seeking relief from an unendurable situation, and may require the assistance of medical professionals or family members to facilitate their wishes. Euthanasia remains a controversial issue in many societies, but those who are subject to it often feel that it is the most humane and compassionate course of action.