Greek riddles
The main Ancient Greek terms for riddle are αἴνιγμα (ainigma, plural αἰνίγματα ainigmata, deriving from αἰνίσσεσθαι 'to speak allusively or obscurely', itself from αἶνος 'apologue, fable') and γρῖφος (grîphos, pl. γρῖφοι grîphoi). The two terms are often used interchangeably, though some ancient commentators tried to distinguish between them.
Riddles appear to have been a popular component of ancient symposia, and have at various points in the history of the Greek-speaking world also been a significant literary form.