Where does “dyner” come from?
dyner (Middle English) comes from Old French disner, from Vulgar Latin disiuno, from Latin disieiūnāre, from Latin iēiūnō, from Latin iēiūnus, from Latin iaiūnus, from Proto-Italic jagjūnos, from Proto-Indo-European Hyeh₂ǵ-yu- — to sacrifice.
Ancestry of “dyner”, step by step