draeniad

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