13 letters · 27 points in Scrabble
adverb in an abundant manner
adverb in a wasteful manner
adverb in a rich and lavish manner
originEtymology tree English extravagant Proto-Indo-European *leyg-der. Proto-Germanic *līkąder. Proto-Germanic *-līkaz Proto-Germanic *-ê Proto-Germanic *-līkê Proto-West Germanic *-līkē Old English -līċe Middle English -ly English -ly English extravagantly From extravagant + -ly.
Etymology from Wiktionary, CC BY-SA 3.0