riddle

A proposition so framed as to exercise one’s ingenuity in discovering its meaning; an ambiguous, complex, or puzzling question offered for solution; an enigma; a dark saying.

Anything abstruse, intricate, paradoxical, or puzzling; a puzzle.

A person who manifests ambiguities or contradictions of character or conduct.

To explain; interpret; solve; unriddle.

To understand; make out.

To puzzle; perplex.

To speak in riddles, ambiguously, or enigmatically.

A sieve, especially a coarse one for sand, grain, and the like.

In founding, a sieve with half-inch mesh, used in the molding-shop for cleaning and mixing old floor-sand.

In hydraulic engineering, a form of river-weir.