Origin: Latin suffix -ous
Luxurious has 3 different meanings across 1 category:
displaying luxury and furnishing gratification to the senses
"an epicurean banquet"
"enjoyed a luxurious suite with a crystal chandelier and thick oriental rugs"
"Lucullus spent the remainder of his days in voluptuous magnificence"
"a chinchilla robe of sybaritic lavishness"
Very fine in quality and comfortable.
"The hotel room offered a luxurious experience with its sumptuous silk sheets and plush down duvet."
In plain English: Luxurious means extremely comfortable and fancy, often made with expensive materials to make you feel special.
"The hotel room was luxurious, featuring silk sheets and a large marble bathtub."
The word luxurious entered English via Middle French and Old French, ultimately deriving from the Latin luxuriōsus, which originally described something rank or luxuriant in growth. Over time, its meaning shifted to describe excessive wealth or comfort rather than just natural abundance.