In Norse mythology, a dís (Old Norse: ˈdiːs, "lady", plural dísir ˈdiːsez̠) is a female deity, ghost, or spirit associated with Fate who can be either benevolent or antagonistic toward mortals. Dísir may act as protective spirits of Norse clans. It is possible that their original function was that of fertility goddesses who were the object of both private and official worship called dísablót, and their veneration may derive from the worship of the spirits of the dead. The dísir, like the valkyries, norns, and vættir, are always referred collectively in surviving references. The North Germanic dísir and West Germanic Idisi are believed by some scholars to be related due to linguistic and mythological similarities, but the direct evidence of Anglo-Saxon and Continental German mythology is limited. The dísir play roles in Norse texts that resemble those of fylgjur, valkyries, and norns, so that some have suggested that dísir is a broad term including the other beings.
Researchers suggest that the basic meaning of the word dís is "goddess".
It usually is said to be derived from the Indo-European root *dhēi-, "to suck, suckle" and a form dhīśana.
Scholars have associated the Dísir with the West Germanic Idisi, seeing the initial i- as having been lost early in Old or Proto-Norse. Jacob Grimm points out that dís Skjöldunga in the Eddic Helgakviða Hundingsbana II (v. 52) is exactly parallel to ides Scildinga "Scylding queen" in Beowulf (l. 1168). He also suggests that Iðunn may be a reflex of the original form of the word. However, except for the First Merseburg Charm, in which they work battle-magic, idis only occurs with the meaning "lady", sometimes "maiden." The words are not presumed to be directly related by some scholars, although the resemblance evidently led to influence on Old Norse poetic use.
Other scholars group all female deities and spirits associated with battle under the class of idis, dis, valkyrie, and other names, such as sigewif (victory-women, associated by the Anglo-Saxons with a swarm of bees), and find the commonalities both linguistically and in surviving myths and magic charms sufficient cause to group together all variations on this theme from various Germanic cultures.