Could vanda “oath, pledge, solemn promise” come from *WAD being a variant of WED "bind"? That could mean that *vasta- "pledge, promise" could be a variant of vesta- which was repurposed as "wed, marry" and derived from BES later in the game.
Hmm, NDEB - NDAB look more like a conceptual change, but RATH - RET can't be (and the resemblance is undeniable) and BAL - BEL are definitely sound.
So as much as I'd still ascribe these pairs more to the fickleness of Tolkien's linguistic taste than to him consciously establishing in-world relations, from the in-world POV you may be right.
Do we have any CaC - CeC…
Do we have any CaC - CeC variation like that attested?
In reply to Do we have any CaC - CeC… by Lokyt
It may be a stretch, but…
It may be a stretch, but perhaps BAL/(M)BEL, NDAB/NDEB, RATH/RET
In reply to Do we have any CaC - CeC… by Lokyt
Hmm, NDEB - NDAB look more…
Hmm, NDEB - NDAB look more like a conceptual change, but RATH - RET can't be (and the resemblance is undeniable) and BAL - BEL are definitely sound.
So as much as I'd still ascribe these pairs more to the fickleness of Tolkien's linguistic taste than to him consciously establishing in-world relations, from the in-world POV you may be right.