noun, feminine/ɛk.stʁa.va.ɡɑ̃s/plural: extravagances
extravagance
“1837 Louis Viardot, L’Ingénieux Hidalgo Don Quichotte de la Manche, translation of El ingenioso hidalgo Don Quijote de la Mancha by Miguel de Cervantes Saavedra, Chapter I” — His curiosity and his extravagance came to the point that he sold several arpents of good working land to buy books of chivalry to read.