9 letters · 14 points in Scrabble
adjective extraordinarily good or great ; used especially as intensifiers
adjective too improbable to admit of belief
adjective being or having the character of a miracle
originFirst attested from 1300 as Middle English merveilous, from Old French merveillus, from merveille (“a wonder”), equivalent to marvel + -ous.
Etymology from Wiktionary, CC BY-SA 3.0