12 letters · 20 points in Scrabble
adverb (used as an intensifier) extremely well
originEtymology tree Latin terrificusder. French terrifiqueder. English terrific Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al Middle English -ly Middle English -ally English -ally English terrifically From terrific + -ally.
Etymology from Wiktionary, CC BY-SA 3.0