a humorous reference to a phrase used in marriage ceremonies: "Wilt (archaic for "will") thou forsaking all others, keepthee only unto her, so long as ye both shall live?" An erg, in physics, is a unit of work (the application of a force through a distance) or energy. See also thou, thee and ye in this glossary.—State of ManCongress Approved Gls (14.5.92)