the word 'suntanned' is a modern english compound adjective. its first element, 'sun', originates from the old english 'sunne', a term with ancient proto-germanic ancestry referring to the celestial source of light and heat. the second element, 'tan', has a more complex journey; it derives from the medieval latin 'tannare', meaning to treat animal hides with tannin to produce leather, a process that darkens the material. by the 19th century, this verb was applied metaphorically to describe the darkening of human skin caused by exposure to sunlight. the suffix '-ned' (a form of '-ed') attaches to create a participial adjective, resulting in the contemporary meaning describing skin darkened by the sun.

Structure: sun (the star) + tan (darken) + ned (adjective suffix) - sun: from old english 'sunne', of germanic origin; related to dutch 'zon' and german 'sonne'. functions as a noun root denoting the celestial body. - tan: from late old english 'tannian' (to convert hide into leather), from medieval latin 'tannare'. the sense 'darken from sun exposure' dates from the 19th century. functions as a verb root meaning to darken. - ned: a variant of the past participle suffix '-ed', used here to form an adjective from the verb 'tan'.