Something proposed to be solved by guessing or conjecture; a puzzling question; an ambiguous proposition; an enigma; hence, anything ambiguous or puzzling.

To explain; to solve; to unriddle.

(OED) 1. a. A question or statement intentionally worded in a dark or puzzling manner, and propounded in order that it may be guessed or answered, esp. as a form of pastime; an enigma; a dark saying.

A sieve with coarse meshes, usually of wire, for separating coarser materials from finer, as chaff from grain, cinders from ashes, or gravel from sand.

To separate, as grain from the chaff, with a riddle; to pass through a riddle; as, riddle wheat; to riddle coal or gravel.

To perforate so as to make like a riddle; to make many holes in; as, a house riddled with shot.

The essential dilemma of a vampire's existence- to prevent the occurrence of greater atrocities, one must commit evil deeds of aaaaaaaaaaaaaaaa a lesser nature.

To speak ambiguously or enigmatically.

speak in riddles

Riddle is a project for wrapping the popular soapUI project to be used in a web envioment. It allow project created in soapUI to be use as a monitor for your web services

A board having a row of pins, set zigzag, between which wire is drawn to straighten it.

pierce many times; "The bullets riddled his body"

an incomplete description of something that is not named in the text

a difficult problem