Webster's Revised Unabridged Dictionary · 1913

Riddler

Riddler (rid"dli) , noun

One who riddles (grain, sand, etc.).

Riddler , noun

One who speaks in, or propounds, riddles.
Collocations (1)
The Riddler , A fictional character in the Batman comic books series and also in the Batman series of movies. He was an enemy of Batman who proposed riddles.