Did the opaque Glagolitic letter names, fritu, heru, tsi and sha among them, ever carry a sense in Slavonic?
The first twenty letter names of Glagolitic are ordinary Slavonic words and read together as connected sentences, from azu buky vede, I know letters, through ritsi slovo tvrido, say the word firmly. From fritu onwards the names stop meaning anything recoverable, and the reference literature records them as of uncertain or unknown origin without offering a reading. This is an absence rather than a disagreement: no camps hold rival etymologies for these names, and no investigation has settled whether they are corrupted Slavonic words, reflexes of Greek letter names, or labels that never carried a sense. The same gap stands over the corresponding Cyrillic names, which are the same names.
What would resolve this A systematic etymological study of the full set of Slavic letter names, working from the earliest abecedaria and from the acrostic alphabet poems of the Old Church Slavonic tradition, which arrange the names in verse and may preserve senses the plain lists do not. A demonstration that the names never carried a sense would close the question as firmly as a set of etymologies would.
Slavic historical linguistics; Old Church Slavonic philologyPeter T. Daniels and William Bright (eds.), The World's Writing Systems