9 letters · 16 points in Scrabble
verb become extravagant; indulge (oneself) luxuriously
verb enjoy to excess
verb thrive profusely or flourish extensively
originFirst attested in 1621; borrowed from Latin lūxuriātus, perfect passive participle of lūxuriō, see -ate (verb-forming suffix).
Etymology from Wiktionary, CC BY-SA 3.0