immunotherapy

The word 'immunotherapy' is a modern scientific compound, built from classical roots to precisely describe a medical concept. The first element, 'immuno-', traces back to the Latin immunis, which originally meant "exempt from a public service or burden" (from in- "not" + munia "duties"). This evolved into the biological sense of being protected or exempt from disease. The second element, '-therapy', comes directly from the Greek therapeia, meaning "healing" or "attendance". The compound, formed in the 20th century, logically combines these ideas to denote a therapeutic approach that works by harnessing or modifying the body's disease-exempting system, the immune response.

Structure: immuno (immune) + therapy (treatment) - immuno: From Latin immunis (exempt from public service, free), via the modern term 'immune'. In this compound, it functions as a combining form meaning "of or relating to the immune system". - therapy: From Greek therapeia (healing, treatment). In this compound, it functions as the head noun meaning "a treatment for illness".