Mjölnir
hammer of the god Thor in Norse mythology

Mjölnir (UK: MYOL-neer, US: MYAWL-neer; from Old Norse Mjǫllnir [ˈmjɔlːnir]) is the hammer of the thunder god Thor in Norse mythology, used both as a devastating weapon and as a divine instrument to provide blessings. The hammer is attested in numerous sources, including the 11th century runic Kvinneby amulet, the Poetic Edda, a collection of eddic poetry compiled in the 13th century, and the Prose Edda, a collection of prose and poetry compiled in the 13th century. The hammer was commonly worn as a pendant during the Viking Age in the Scandinavian cultural sphere, and Thor and his hammer occur depicted on a variety of objects from the archaeological record. Today the symbol appears in a wide variety of media and is again worn as a pendant by various groups, including adherents of modern Heathenry.
Etymology
The etymology of the hammer's name, Mjǫllnir, is disputed among historical linguists. Old Norse Mjǫllnir developed from Proto-Norse *melluniaR and one proposed derivation connects this form to Old Church Slavonic mlunuji and Russian molnija meaning 'lightning' (either borrowed from a Slavic source or both stemming from a common source) and subsequently yielding the meaning 'lightning-maker'. Another proposal connects Mjǫllnir to Old Norse mjǫll meaning 'new snow' and modern Icelandic mjalli meaning 'the color white', rendering Mjǫllnir as 'shining lightning weapon'. Finally, another proposal connects Old Norse Mjǫllnir to Old Norse mala meaning 'to grind' and Gothic malwjan 'to grind', yielding Mjǫllnir as meaning 'the grinder'.
Attestations
Kvinneby amulet
Likely worn around the neck, the Kvinneby amulet is a small copper amulet found in Öland, Sweden that dates from the 11th century and features an Old Norse Younger futhark inscription that invokes Thor and his hammer. Runologists Mindy MacLeod and Bernard Mees translate the amulet as follows:
'Here I carve for you (runes of) help, Bofi.
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This entry incorporates text from “Mjölnir” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.