asiantaeth

== Welsh == === Etymology === asiant +‎ -aeth === Noun === asiantaeth f (plural asiantaethau) agency (business or governmental establishment) === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “asiantaeth”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies