1. a puzzling question or problem posed as a game or test of wit
2. something or someone that is mysterious or difficult to understand

1. to fill with holes
2. to affect throughout; to permeate

Examples

• The sphinx posed a famous riddle to travelers.
• Can you solve this riddle about what has four legs in the morning?
• Her sudden disappearance remains a riddle to the police.
• The old barn door was riddled with bullet holes.
• The report was riddled with errors and inconsistencies.
• His behavior is a complete riddle to me.
• Termites had riddled the wooden beams with holes.