A general term for any bad or diseased condition of the body; literally any bad disease or pathological state.
From Greek 'kakos' (bad) + 'pathos' (disease, feeling, suffering), a general medical term that could apply to almost any negative health condition.
The prefix 'patho-' appears in hundreds of medical words (pathology, psychopath, sympathetic) because ancient Greeks thought disease came from emotional and physical 'suffering,' giving us linguistic structure that outlasted the medical theory.
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