afiechyd meddwl

== Welsh == === Noun === afiechyd meddwl m (plural afiechydon meddwl) mental disorder === Mutation === === Further reading === D. G. Lewis, N. Lewis, editors (2005–present), “afiechyd”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “afiechyd meddwl”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies