luksuz

1. luxury
   Žive u luksuzu, a nikad nisu radili. — They live in luxury, though they've never worked.
2. luxury; something one can't afford
   Taksi je za mene luksuz, idem autobusom. — A taxi is a luxury for me, I take the bus.
   Ne možemo sebi da dozvolimo luksuz da kasnimo. — We can't afford the luxury of being late.

The adjective is luksuzan: luksuzan hotel, luksuzan auto.