The story
- Proto-Indo-European*dʰeyǵʰ-
- Proto-Indo-European*dʰóyǵʰos
- Proto-Germanic*daigaz
- Proto-West Germanic*daig
- Old Englishdāg
- Middle Englishdogh
- Englishdough
- Proto-Germanic*hnuts
- Proto-West Germanic*hnut
- Old Englishhnutu
- Middle Englishnote
- Englishnut
- English todaydoughnut
From dough + nut, 1809 because originally small, nut-sized balls of fried dough, or, more likely, from nut in the earlier sense of "small rounded cake or cookie", with the toroidal shape becoming common in the twentieth century. First attested in Knickerbocker’s History of New York, by Washington Irving, 1809.
Etymology from Wiktionary, CC BY-SA 4.0.