Where does “perfydhder” come from?

perfydhder (Cornish) comes from Cornish der, from Proto-Brythonic *truɨ, from Proto-Celtic *trei, from Proto-Indo-European terh₂- — to cross over, pass through, overcome.

perfydhder (Cornish): perfection

Definitions

  1. perfection

Ancestry of “perfydhder”, step by step

perfydhder traces back through two separate lines of ancestry.

via Cornish der

StepLanguageWordMeaning
1Cornishderthrough, via
2Proto-Brythonic*truɨ—
3Proto-Celtic*treithrough
4Proto-Indo-Europeanterh₂-to cross over, pass through, overcome

via Cornish perfydh

StepLanguageWordMeaning
1Cornishperfydhperfect
Every word from Proto-Indo-European terh₂- →Every word from Proto-Celtic *trei →Every word from Proto-Brythonic *truɨ →