svæfingargrúnar
Svæfingargrúnar is a term that appears in Old Norse literature, often associated with sorcery or a specific type of magical ritual. Its precise meaning and application remain subjects of scholarly debate, but it is generally understood to refer to a practice or object used in seiðr, a prominent form of Norse magic.
The term itself can be broken down into "svæfing" meaning sleep or trance, and "grúnar" possibly relating
Evidence for svæfingargrúnar is primarily found in sagas and Eddic poetry, where seiðr practitioners are described.