9 letters · 17 points in Scrabble
noun a particularly baffling problem that is said to have a correct solution
originEtymology tree English mystify Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English mystifier From mystify + -er.
Etymology from Wiktionary, CC BY-SA 3.0