Where does “trosadwy” come from?

trosadwy (Welsh) comes from Welsh trosi, from Welsh -i, from Old Welsh -im, from Proto-Brythonic *-iβ̃.

Ancestry of “trosadwy”, step by step

StepLanguageWordMeaning
1Welshtrosito convert
2Welsh-iPluralisation suffix; Forms verbnouns from verb...
3Old Welsh-im—
4Proto-Brythonic*-iβ̃—
Every word from Proto-Brythonic *-iβ̃ →Every word from Welsh -i →Every word from Welsh trosi →
trosadwy — Etymology, Origin & Word History | Etymology Explorer