cymwynaswr

== Welsh == === Etymology === cymwynasu +‎ -wr === Noun === cymwynaswr m (plural cymwynaswyr, feminine cymwynaswraig) benefactor === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “cymwynaswr”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies