trechedd

== Welsh == === Etymology === From trech (“superior, stronger”) +‎ -edd. === Noun === trechedd m (uncountable) superiority, supremacy, dominance === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “trechedd”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies