• IPA: /ɪkˈstɹævəɡəns/

extravagance

1. Excessive or superfluous expenditure of money.
2. Prodigality, as of anger, love, expression, imagination, or demands.
   • 1913, Mrs. [Marie] Belloc Lowndes, chapter I, in The Lodger, London: Methuen, OCLC 7780546 ↗; republished in Novels of Mystery: The Lodger; The Story of Ivy; What Really Happened, New York, N.Y.: Longmans, Green and Co., […], [1933], OCLC 2666860 ↗, page 0016 ↗:

     A great bargain also had been the excellent Axminster carpet which covered the floor; as, again, the arm-chair in which Bunting now sat forward, staring into the dull, small fire. In fact, that arm-chair had been an extravagance of Mrs. Bunting. She had wanted her husband to be comfortable after the day's work was done, and she had paid thirty-seven shillings for the chair.

• lavishness
• profusion
• wildness
• irregularity
• excess
• prodigality
• profusion
• waste
• unreasonableness
• recklessness

• frugality
• economize
• moderation

• Russian: расточительство

• Spanish: extravagancia