arf eang ddistryw

== Welsh == === Etymology === Literally, “weapon of widespread destruction”. === Noun === arf eang ddistryw m (plural arfau eang ddistryw) weapon of mass destruction Synonym: arf dinistr torfol === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “arf eang ddistryw”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies