effeithlon

== Welsh == === Etymology === From effaith (“effect”) +‎ -lon. === Pronunciation === IPA(key): /ɛˈfei̯θlɔn/ Rhymes: -ei̯θlɔn === Adjective === effeithlon (feminine singular effeithlon, plural effeithlon, equative mor effeithlon, comparative mwy effeithlon, superlative mwyaf effeithlon) efficient ==== Usage notes ==== This is not to be confused with effeithiol (“effective”). ==== Derived terms ==== effeithlonrwydd (“efficiency”) === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “effeithlon”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies