Oh I also wonder about some Cadhinor words which passed into Kebreni but their Methaiun form is not given. For example
adnedu < admettan
aladaḣ < aluatas
demedu < demettan
kaadau < aletes caedel
lureḣ < lures
lyḣ < leus
From those I can deduce that the Methaiun forms were either identical to Cadhinor (lures, leus) or were introduced directly into Kebreni by Cadhinor-saavy scholars.
For adnedu and demedu I can guess intermediate Methaiun forms *adnet- and *demet- if they ever existed
I always assumed with these that the Cadhinor was borrowed into Old Kebreni, given that dividing lines are always going to be fuzzy.