byrllysg

== Welsh == === Etymology === From bwr (thick, strong) + llysg (rod, staff). === Noun === byrllysg m (plural byrllysgau) rod, sceptre; mace. === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “byrllysg”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies