Where does “ymwacáu” come from?

ymwacáu (Welsh) comes from Welsh gwacáu, from Welsh -au, from Middle Welsh -eu, from Old Welsh -ou, from Proto-Brythonic -ow, from Proto-Celtic -owes.

ymwacáu (Welsh): to empty oneself

Definitions

  1. to empty oneself

Ancestry of “ymwacáu”, step by step

ymwacáu traces back through two separate lines of ancestry.

via Welsh gwacáu

StepLanguageWordMeaning
1Welshgwacáuto empty, to evacuate, to flush
2Welsh-au-s
3Middle Welsh-eu—
4Old Welsh-ou—
5Proto-Brythonic-ow—
6Proto-Celtic-owes—

via Welsh ym

StepLanguageWordMeaning
1WelshymForm of yn used before bilabials
Every word from Proto-Celtic -owes →Every word from Welsh -au →Every word from Middle Welsh -eu →