In Norse mythology, Lævateinn is a weapon mentioned in the Poetic Edda poem Fjölsvinnsmál. The name Lævateinn does not appear in the original manuscript reading, but is an emendation from Hævateinn made by Sophus Bugge and others. The amended name Lævateinn is etymologically considered to be a kenning for a sword (Old Norse "damage twig").
The weapon is mentioned briefly in the poem Fjölsvinnsmál:
Bellows comments that Lægjarn means "Lover of Ill" and, like the name Lopt, refers to Loki.
Viktor Rydberg theorized that the weapon referred to was the sword forged by Völundr, and is the same one as Freyr gave away to gain Gerðr. Henry Adams Bellows comments that, regarding Lævateinn, "the suggestion the reference is to the mistletoe which Baldr was killed seems hardly reasonable."
Leszek Gardeła theorized that the weapon was a magic staff, tein, meaning 'twig', being part of the general word for magic staff gambantein.
- Simek (2007:185).
- Thorpe (1907:96–97).
- Bellows (2004:245).
- Gardeła (2009).
- Bellows, Henry Adams (Trans.) (2004). The Poetic Edda: The Mythological Poems. Courier Dover Publications. ISBN 0-486-43710-8
- Gardeła, Leszek (2009). "A Biography of the Seiðr-Staffs. Towards an Archaeology of Emotions". In L.P. Słupecki, J. Morawiec (eds.), Between Paganism and Christianity in the North. Rzeszów: Rzeszów University, 190-219.
- Simek, Rudolf (2007) translated by Angela Hall. Dictionary of Northern Mythology. D.S. Brewer. ISBN 0-85991-513-1
- Thorpe, Benjamin (Trans.) (1907). The Elder Edda of Saemund Sigfusson. Norrœna Society.