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
Ancestry of “tonnfhad”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Irish | tonn | wave |
| 2 | Old Irish | tonn | wave; outpouring; sea |
| 3 | Proto-Celtic | tondā | skin; surface, skin |
| 4 | Proto-Indo-European | tend- | to stretch, to extend; to split, cut off |
| 5 | Proto-Indo-European | temh₂- | to stretch, string; to cut |