dweorg

Old English dweorg comes from Proto-Germanic *dwergaz, of uncertain deeper origin. One theory connects it to a PIE root meaning 'to deceive' or 'to damage' — dwarves were tricksters and cause of nightmares in early Germanic culture. In Old Norse, dvergar were master craftsmen who forged the gods' most powerful weapons: Thor's hammer Mjölnir, Odin's spear Gungnir, and Freyr's golden boar Gullinbursti. They lived underground, worked metal, and were associated with both creation and deception.

The 'small person' meaning developed later in English. In Old Norse and Old English, dwarves were not necessarily physically small — they were defined by their role (craftsman, spirit) rather than their stature. The association with smallness strengthened through medieval folklore and was cemented by the Brothers Grimm's 'Snow White' (1812), in which seven dwarves live in a cottage and work in a mine. The Grimm dwarves are small, kind, and harmless — a dramatic shift from the Norse craftsmen who forged weapons for gods.

The medical term 'dwarfism' (now largely replaced by the preferred term 'short stature' or specific condition names like achondroplasia) borrowed the word from mythology. Using a mythological term for a medical condition was common in earlier medicine (see also hermaphrodite, narcissism, nymphomania) but is now recognized as dehumanizing. Little People of America, founded in 1957, advocates for person-first language.

The astronomical term 'dwarf star' was introduced by Ejnar Hertzsprung in 1906, and 'dwarf planet' was defined by the International Astronomical Union in 2006, when Pluto was reclassified. The mythological word for an underground craftsman became the astronomical word for a small celestial body. The Norse forge-worker became a star category.