rhwymwr

== Welsh == === Etymology === From rhwymo +‎ -wr. === Noun === rhwymwr m (plural rhwymwyr) binder, bookbinder === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “rhwymwr”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies