smallpox

the word "smallpox" is a compound formed in early modern english to distinguish this severe disease from the "great pox," a contemporary term for syphilis. the "small" element refers not to the severity but to the characteristic size of the pustules it produces, which were notably smaller than the skin lesions of syphilis. "pox" itself derives from the plural of the middle english "pokke," a term for a pustule or blister, which can be traced back to a germanic root. thus, the name is a descriptive clinical term, literally meaning "the disease marked by small pustules."

Structure: small + pox small: from old english smæl (meaning "slender, narrow, not large"), functioning as a descriptive modifier in this compound. pox: from middle english pokkes, plural of pokke (meaning "pustule"), functioning as the core noun element denoting the disease.