the word 'sunburn' is a transparent compound formed from two old english roots. 'sun' derives from proto-germanic sunnōn, ultimately from the proto-indo-european root sóh₂wl̥, meaning 'sun'. 'burn' comes from proto-germanic brinnaną ('to burn') and is related to the effect of fire. the compound directly and logically describes the condition of the skin being 'burned' by the 'sun', a concept that has been relevant since antiquity. its formation follows the common germanic pattern of creating concrete, descriptive nouns by combining two existing words, with the meaning remaining closely tied to the literal sum of its parts.

Structure: sun (star) + burn (injury) sun (old english, noun, referring to the celestial body); burn (old english, noun/verb, referring to an injury caused by heat or fire).