The phrase "suit-and-tie" is a modern English compound that crystallized in the 20th century to describe the standard uniform of the white-collar professional class. Its logic is purely descriptive, combining the core components of the attire: the matching "suit" of jacket and trousers, connoting order and conformity, and the "tie," a strip of cloth knotted around the neck, historically a marker of status and restraint. The evolution of this phrase mirrors the social history of business dress, where the Victorian and Edwardian formal wear was streamlined into a democratized, corporate uniform symbolizing professionalism, authority, and sometimes conservatism. Its meaning is thus not derived from ancient roots but from the socio-cultural codification of specific garments into a singular concept of formal dress.

This is a hyphenated compound phrase. 'Suit' originates from Anglo-French 'siute', Old French 'suite', meaning "a following, a set of things". 'Tie' originates from Old English 'tīgan', meaning "to bind". The hyphenated compound functions as a single lexical unit.