Similar words: intrigue, intrigued, liqueur, fatigue, fatigued, fatigues, fatigue duty, intriguing. Meaning: [dərɪ'gɜː] 
adj. required by etiquette or usage or fashion.
adj. required by etiquette or usage or fashion. 
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1. T-shirts now seem almost de rigueur in the West End.
2. Evening dress is de rigueur at the casino.
3. Evening dress is de rigueur at the Casino.
4. Where I work, smart suits are de rigueur for the women.
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5. Tuxedos are de rigueur at the event.
6. Thus, crime is common, apathy is de rigueur, and cynicism is rampant.
7. Then again, let us nor forget, it is considered de rigueur to keep a few foreigners around.
8. To attract crowds large enough to fill up the ornate space, big spectacles were de rigueur.
9. They are the same build, his back was to him, they wear the de rigueur blazers.
10. Instruction as to when and where a silk hat is de rigueur.
More similar words: intrigue, intrigued, liqueur, fatigue, fatigued, fatigues, fatigue duty, intriguing, queue up, meringue, guerilla, perigee, the right way, budgerigar, triggering, be in the right, divine right, derive, deride, derived, derision, ordering, derisory, derisive, soldering, derivate, wandering, divine right of kings, pondering, doddering.