Where does “-onydh” come from?

-onydh (Cornish) comes from Cornish -onieth, from Cornish -ieth, from Proto-Brythonic -aɨθ, from Proto-Celtic axtā.

Ancestry of “-onydh”, step by step

StepLanguageWordMeaning
1Cornish-oniethForms nouns for sciences/studies; -logy, -ology
2Cornish-iethForms abstract nouns
3Proto-Brythonic-aɨθ
4Proto-Celticaxtā

Words derived from “-onydh

Every word from Proto-Celtic axtā