gwirfoddoli

== Welsh == === Etymology === From gwirfoddol (“voluntary”) +‎ -i. === Verb === gwirfoddoli (first-person singular present gwirfoddolaf) to volunteer ==== Conjugation ==== ==== Derived terms ==== gwirfoddolwr (“volunteer”) === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwirfoddoli”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies