tour de forcetour de force
pl. tours′ de force′
an unusually skillful or ingenious creation, production, or performance, sometimes one that is merely clever or spectacular
Origin of tour de forceFr, literally , feat of strength
tour de force
nounpl. tours de force
A feat requiring great virtuosity or strength, often deliberately undertaken for its difficulty: “In an extraordinary structural tour de force the novel maintains a dual focus” (Julian Moynahan).
Origin of tour de forceFrench : tour, turn, feat + de, of + force, strength.
(plural tours de force)
French “feat of strength" circa 19th century.