The word 'top-hatted' is a modern English compound adjective formed by adding the adjectival suffix '-ed' to the noun 'top hat'. The noun 'top hat' itself emerged in the late 18th century, combining the common English word 'hat', from Old English 'hætt', with 'top', from Old English 'topp', to describe a man's formal hat with a high, flat crown. The suffix '-ed', deriving from Old English '-ede', '-ode', or '-ad', is a productive suffix for creating adjectives that mean 'possessing' or 'wearing' the noun it follows. Thus, the literal construction 'having a top hat' directly and logically yields the modern meaning of being attired in that specific formal headgear.

Structure: top-hat (a type of hat) + ed (adjective suffix) - top-hat: A compound noun of English origin, formed from 'top' (highest part) and 'hat' (head covering). Its functional role is as the base noun. - ed: A suffix of Old English origin, used to form adjectives from nouns, meaning 'having' or 'characterized by'.