Where does “dofna” come from?

dofna (Old Norse) comes from Proto-Germanic dubnaną, from Proto-Germanic -naną, from Proto-Germanic -nō-, from Proto-Indo-European -néh₂-.

Ancestry of “dofna”, step by step

StepLanguageWordMeaning
1Proto-Germanicdubnanąto become weak
2Proto-Germanic-nanąForms fientive verbs, with a sense of 'to become...
3Proto-Germanic-nō-—
4Proto-Indo-European-néh₂-—

Words derived from “dofna”

Every word from Proto-Indo-European -néh₂- →Every word from Proto-Germanic -naną →Every word from Proto-Germanic dubnaną →