The adjective 'vaunted' is built upon the verb 'vaunt', which carries the core meaning of boasting. This verb traces its lineage to Latin 'vanus', meaning 'empty' or 'vain'. The semantic evolution is clear: boasting involves making empty or vain claims about one's worth or achievements. The addition of the participial suffix '-ed' transforms the action of boasting into a descriptive state, characterizing something that has been, often excessively, praised or celebrated.

Structure: vaunt (to boast) + ed (adjective suffix) 'vaunt' originates from Middle English 'vaunten', from Anglo-French 'vanter', from Late Latin 'vanitare' meaning 'to boast', from Latin 'vanus' meaning 'empty, vain'. The suffix '-ed' is from Old English '-ed', '-od', '-ad', forming adjectives from nouns or verbs.