w 4 a 1 c 3 k 5 y 4
5 letters · 17 points in Scrabble
Meaning
adjective ludicrous, foolish
adjective informal or slang terms for mentally irregular
originEtymology tree English whack Proto-Indo-European *-kos Proto-Germanic *-gaz Proto-West Germanic *-g Old English -iġ Middle English -y English -y English wacky From whack (“someone who whacked his head onto something often, hence being weird”) + -y.
Etymology from Wiktionary, CC BY-SA 3.0