9 letters · 10 points in Scrabble
verb give spiritual insight to; in religion
verb cast rays of light upon
verb expose to radiation
originFrom Middle English irradiate (“illuminated, shining”), borrowed from Medieval Latin irradiātus, perfect passive participle of irradiō, from ir- (“against; into; on, upon”) + radiō (“to cause to radiate, irradiate; to emit beams, radiate”), from radius (“ray of light; rod, staff; spoke of a wheel”) + -ō (first conjugation verb-forming suffix) (further etymology uncertain; possibly ultimately from…
Etymology from Wiktionary, CC BY-SA 3.0