bara caws y gwcw

== Welsh == === Etymology === Literally, “bread-cheese of the cuckoo”. === Noun === bara caws y gwcw m alternative form of bara a chaws y gwcw (“wood sorrel; common sorrel”) === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “bara caws y gwcw”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies