Page "Devi and Vrkis feminines" Paragraph 2

The inflectional type is usually accepted to reach back into Proto-Indo-European times, with an exact correspondence of Sanskrit and Old Norse ylgr, both meaning " she-wolf ", first described by Karl Verner in 1877 ( see Verner's law ).

The distinction between Devi and Vrkis dies out in during the Vedic period, and Pāṇini is not aware of it, classifying the ī-stems by their accentuation ( Vrkis words are a subset of NīS ).