Talk:-oro

czworo?
I think the -oro ending might be a back-formation from czworo, which was originally czwór- + -o, but then reinterpreted as czw- + oro. The original -o might be a variant of -e occurring after a hard consonant.

Without these back-formations, these words might have sounded like this:

5: piącie? pięcie? piąto? pięto?

6: szóście? szósto?

7: siódmo? siódme? siódmie?

8: ósmo? ósmie? óśmie?

9: dziewiącie? dziewięcie? dziewiąto? dziewięto?

10: dziesiącie? dziesięcie? dziesiąto? dziesięto?

I think these words might be replaced by the newer -oro numerals because the original ones might be hard to pronounce in the genitive case: piętga, szostga, siodmga, osmga, dziewiętga, dziesiętga

The other Slavic languages have the same -oro endings, which means the change happened when Proto-Slavic was spoken. I am a Green Bee (talk) 11:49, 27 May 2023 (UTC)