6 letters · 9 points in Scrabble
originFrom Middle English witteren, witeren, of North Germanic origin, from Old Norse vitra (“to make wise, make sure”), from Proto-Germanic *witrōną (“to make wise”), from Proto-Indo-European *weyd- (“to know”). Cognate with Icelandic vitra (“to make wise, make certain”), Icelandic vitur (“wise”). More at wit, wis.
Etymology from Wiktionary, CC BY-SA 3.0