proethnic

adj

1. (not-comparable)of or pertaining to the period prior to the split of the Proto-Indo-European language into the Indo-European language family

   “The original meaning of the root is 'put'; but, from the proethnic period, a secondary development in the line ('set,' 'establish,' and so) 'make,' 'do,' is clear.”

   “Since νς + consonant lost its y in proethnic Greek (77.2), the same would be true of final νς in close combination with a following word beginning with a consonant.”