8 letters · 12 points in Scrabble
verb declare or make legally valid
verb prove valid; show or confirm the validity of something
verb give evidence for
originFirst attested in 1648; borrowed from Medieval Latin validātus (“to validate”) (perhaps through Middle French valider), the perfect passive participle of validō (see -ate (verb-forming suffix)), from validus + -ō (verb-forming suffix). By surface analysis, valid + -ate.
Etymology from Wiktionary, CC BY-SA 3.0