the.com/glazed donut

means A deep-fried yeast or cake ring dipped in a thin sugar glaze that hardens into a shiny, slightly sticky shell.

from 'Donut' (or 'doughnut') shows up in writing in the early 1800s, literally 'dough' + 'nut' — early versions were small fried nuggets of dough, nut-sized, often with a nut or filling tucked in the center rather than the hole we picture now. The ring shape with a hole is a later development, and the 'glazed' part just borrows the ordinary English sense of 'glaze' — a thin, glassy coating, the same word used for pottery and windows — applied to the sugar-and-water (or icing) dip that sets shiny and hard on the fried dough.