fastvængjar
Fastvængjar is a term used in Old Norse literature, particularly in sagas and Eddic poetry, to refer to a specific type of otherworldly or supernatural beings. The precise meaning and nature of fastvængjar are not definitively established and have been subject to scholarly interpretation. Generally, they are understood as spirits, elves, or beings associated with the natural world, often possessing magical or potent abilities.
The etymology of the word is debated, with "fast" potentially meaning "strong" or "firm," and "vængjar" possibly
In some contexts, fastvængjar appear to be benevolent or neutral entities, while in others, they can be