From i (“to”) + ymddaith (“to go, to travel”).[1]
ymaith
- away, off, out of the way
- Synonyms: bant, i ffwrdd
- Antonym: ymlaen
- ^ R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “ymaith”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies