gwenwyniad

== Welsh == === Etymology === gwenwyno (“to poison”) +‎ -iad. === Noun === gwenwyniad m (uncountable) poisoning pollution, defilement Synonyms: llygriad, halogiad, difwyniad ==== Derived terms ==== gwenwyn gwaed (“blood poisoning, toxaemia”) === Mutation === === Further reading === D. G. Lewis, N. Lewis, editors (2005–present), “gwenwyniad”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwenwyniad”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies