The compound adjective 'tree-lined' is a modern English formation that vividly describes a landscape feature through a combination of concrete nouns and a functional suffix. The core element 'tree', with its ancient Germanic roots denoting a large woody plant, is combined with 'line', a word of Latin lineage via Old English that evolved from meaning a linen thread to signify any linear arrangement. The suffix '-ed' is appended to the verb 'line', turning the phrase "lined with trees" into a single attributive adjective. This logical construction paints a direct mental picture: roads or streets are figuratively "drawn" or "marked" with rows of trees, transforming a descriptive phrase into a efficient lexical unit.

Structure: tree (plant) + line (arrange in a row) + ed (adjective suffix) - 'tree': From Old English 'trēow', of Germanic origin, related to Dutch 'tree' and German 'Tree'. It functions as the primary noun root, specifying the object. - 'line': From Old English 'līne', from Latin 'līnea' (linen thread, string). In this compound, it functions as a verb root meaning "to mark with lines or rows". - 'ed': A suffix of Old English origin used to form adjectives from nouns or verbs, indicating "having the characteristics of".