Where does “troseddwr” come from?

troseddwr (Welsh) comes from Welsh troseddu, from Welsh trosedd, from Welsh -edd, from Middle Welsh -eð, from Proto-Celtic *-iyā, from Proto-Indo-European -éh₂.

troseddwr (Welsh): criminal, offender

Definitions

criminal, offender

Ancestry of “troseddwr”, step by step

Step	Language	Word	Meaning
1	Welsh	troseddu	to commit a crime, to offend, to transgress
2	Welsh	trosedd	crime, offence, transgression
3	Welsh	-edd	-ness, -ment; -s
4	Middle Welsh	-eð	—
5	Proto-Celtic	*-iyā	Forms abstract nouns from adjectives
6	Proto-Indo-European	-éh₂	—

Every word from Proto-Indo-European -éh₂ →Every word from Welsh -edd →Every word from Middle Welsh -eð →