Re: [tied] English /p/ in "up" and "open"

> There is no such thing as a CVCVC root nor a yet CVC-VC root.

Some few roots are CV (e.g. *me) but most (really all) others are
CVC.

>
> I already have glasses.
>
> Perhaps you should consider obtaining a thinking cap?
>
>

CVC-VC means
a root (CVC)
with a suffix (-VC)

cf PIE *up-er > Proto-Celtic *wer-.

Torsten