anti-rejection

The term is a modern compound, formed within English by combining the Greek-derived prefix 'anti-' with the Latinate noun 'rejection'. The prefix 'anti-' carries its classical sense of 'against' or 'opposed to', directly opposing the action described by the base word. 'Rejection' originates from the Latin verb 'reicere', meaning 'to throw back', which evolved to signify refusal or dismissal. In the specific medical context of organ transplantation, coined in the mid-20th century, the compound logically describes measures taken against the body's immunological act of throwing back or refusing the foreign graft.

Structure: anti (against) + rejection (act of rejecting) anti: from Greek 'anti', meaning 'against'. A prefix indicating opposition or prevention. rejection: from Latin 'reiectio', from 'reicere' (to throw back). The core noun form meaning the act of refusing to accept.