mara

A nightmare; a spectre or wraith-like creature in Germanic and particularly Scandinavian folklore; a female demon who torments people in sleep by crouching on their chests or stomachs, or by causing terrifying visions.

A type of god that prevents accomplishment or success.

Any malicious or evil spirit.

Any caviid rodent of genus Dolichotis, common in the Patagonian steppes of Argentina.