stud

{{11}}stud (1) "nailhead, knob," O.E. studu "pillar, prop, post," from P.Gmc. *stud- (Cf. O.N. stoð "staff, stick," prop. "stay," M.H.G. stud, O.E. stow "place"), from PIE *stu-, variant of root *sta- "to stand" (see STET (Cf. stet)). Sense expanded by late 14c. to include ornamental devices fixed in and projecting from a surface. The verb is c.1500 in the literal sense of "set with studs," 1560s in studded with "as though sprinkled with nails with conspicuous heads."

{{12}}stud (2) "horse used for breeding," O.E. stod "herd of horses, place where horses are kept for breeding," from P.Gmc. *stodo (Cf. O.N. stoð, M.L.G. stod, O.H.G. stuot "herd of horses," Ger. Stute "mare"), from PIE root *sta- "to stand," with derivatives meaning "place or thing that is standing" (Cf. O.C.S. stado "herd," Lith. stodas "a drove of horses;" see STET (Cf. stet)). Sense of "male horse kept for breeding" is first recorded 1803; meaning "man who is highly active and proficient sexually" is attested from 1895; that of "any young man" is from 1929.