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.
Borrowed from Old Norse mara, from Proto-Germanic *marǭ, cognate with Old English mare or mære. Doublet of mare. See nightmare.
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Ćwicz mówienie i zapamiętywanie " mara " i wielu innych słów i zdań z angielski .