The compound adjective 'white-walled' is a straightforward combination of two English elements. The first element, 'white', descends from the Proto-Germanic 'hwītaz', which conveyed the concept of brightness and light, evolving into its specific color meaning in Old English. The second element, 'walled', originates from the Old English 'weall', a term for a defensive rampart or structure, derived from Latin 'vallum' (rampart, wall). The suffix '-ed' is added to the noun to create an adjective meaning 'possessing or characterized by' the noun. Thus, the modern term 'white-walled' literally and logically describes a structure characterized by walls of a bright, light-reflecting color.

Structure: white (color) + walled (having walls) - white: From Old English 'hwīt', of Germanic origin; related to Dutch 'wit' and German 'weiss'. Functions as an adjective describing the color. - walled: From Old English 'weall' (noun) meaning a rampart or structure, plus the suffix '-ed' (from Old English '-ede'), forming an adjective meaning 'having walls'.