10 letters · 13 points in Scrabble
adjective so great in size or force or extent as to elicit awe
originFirst attested from 1547, from Late Latin stupendus (“stunning, amazing”), from the verb stupeō (“(I) am stunned”). Doublet of stupend (which is obsolete), and related to stupor and stupid.
Etymology from Wiktionary, CC BY-SA 3.0