Where does “tonnfhad” come from?

tonnfhad (Irish) comes from Irish tonn, from Old Irish tonn, from Proto-Celtic tondā, from Proto-Indo-European tend-, from Proto-Indo-European temh₂- — to stretch, string; to cut.

tonnfhad (Irish): wavelength

Definitions

  1. wavelength

Ancestry of “tonnfhad”, step by step

tonnfhad traces back through two separate lines of ancestry.

via Irish tonn

StepLanguageWordMeaning
1Irishtonnwave
2Old Irishtonnwave; outpouring; sea
3Proto-Celtictondāskin; surface, skin
4Proto-Indo-Europeantend-to stretch, to extend; to split, cut off
5Proto-Indo-Europeantemh₂-to stretch, string; to cut

via Irish fad

StepLanguageWordMeaning
1Irishfadlength
2Old Irishfotlength
3Proto-Celtic*wazdos—
Every word from Proto-Indo-European temh₂- →Every word from Proto-Indo-European tend- →Every word from Proto-Celtic tondā →
tonnfhad — Etymology, Origin & Word History | Etymology Explorer