Where does “tro” come from?
tro (Scottish Gaelic) comes from Old Irish tremi, from Old Irish tre, from Proto-Celtic trimo-, from Proto-Celtic *trei, from Proto-Indo-European terh₂- — to cross over, pass through, overcome.
tro (Scottish Gaelic): through
Ancestry of “tro”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old Irish | tremi | — |
| 2 | Old Irish | tre | through |
| 3 | Proto-Celtic | trimo- | — |
| 4 | Proto-Celtic | *trei | — |
| 5 | Proto-Indo-European | terh₂- | to cross over, pass through, overcome |