ystrad

== Welsh == === Etymology === From Proto-Celtic *stratos, from Proto-Indo-European *str̥h₃tós. Compare Scottish Gaelic srath, English strath. === Pronunciation === IPA(key): /ˈəsdrad/, [ˈəstrad] === Noun === ystrad m (plural ystradoedd) (floor of) valley, vale, plain === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “ystrad”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies