- plumber
- c.1100, "a worker in any sort of lead," from O.Fr. plummier (Fr. plombier), from L. plumbarius "worker in lead," properly an adj., "pertaining to lead," from plumbum "lead" (see plumb). Meaning shifted 19c. to "workman who installs pipes and fittings" as lead water pipes became the principal concern of the trade. In U.S. Nixon administration (1969-74), the name of a special unit for investigation of "leaks" of government secrets. Plumbing "water pipes" is first recorded 1884.