The compound adjective 'thatched-roof' is a transparent descriptor from the Germanic linguistic tradition. Its first element, 'thatched', originates from the Old English verb 'þeccan', meaning to cover or conceal, which is related to the noun 'thatch' for a roofing material. The second element, 'roof', descends from Old English 'hrōf', referring to the top covering of a structure. The compound logically and literally describes the defining architectural feature—a roof covered with thatch—a building method used since ancient times across Northern Europe. The term remains a direct, descriptive combination without significant semantic shift from its constituent parts.

Structure: thatched (sense) + roof (sense) thatched: From Old English 'þeccan' (to cover, to roof), functioning as a past participle adjective meaning 'covered with thatch'. roof: From Old English 'hrōf' (roof, ceiling, top), functioning as a noun denoting the structure covering a building.