gorau glas

== Welsh == === Etymology === Literally, “green best”. === Adjective === gorau glas (one's) very best, (one's) level best === Mutation === === Further reading === D. G. Lewis, N. Lewis, editors (2005–present), “gorau”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gorau glas”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies