From: Piotr Gasiorowski
Message: 59981
Date: 2008-09-11
> The Latin n-stems alternate -o:/-in-, the one in -io:/-io:n- I suspectIt's clearly/obviously a weak noun corresponding to the *swe- of
> they have arisen from the former by generalization. Traditionally the
> latter is taken apart into two separate suffixes -i- and -o:/-on-. I
> think something similar happened here. Cf. the -n- of PGmc. *sei-n-.