Reconstruction talk:Proto-Brythonic/rreiθ

Celtic stem class
The PIE root page lists both and  as possible ancestors. How can we tell which? —CodeCat 17:43, 26 September 2016 (UTC)
 * The cognate in Old Irish is a u-stem. Also, while it shouldn't be used as conclusive evidence by itself, the fact that its oldest attested plural is the u-stem plural is additional evidence. If it had been a masculine o-stem, the plural form *riθ would be expected. Anglom (talk) 21:56, 26 September 2016 (UTC)
 * I can find, which is a u-stem, but its meaning is quite different from the Brythonic reconstruction. It seems to mean "form" or "shape". Is that the one, nonetheless? —CodeCat 22:13, 26 September 2016 (UTC)
 * The Old Irish cognate is . Anglom (talk) 22:35, 26 September 2016 (UTC)
 * I see. It's etymology is wrong then. What might be from then, ? —CodeCat 23:13, 26 September 2016 (UTC)
 * According to Matasovic, yes. Anglom (talk) 23:31, 26 September 2016 (UTC)