erfin Mair

== Welsh == === Etymology === Literally “Mary's turnips”. === Noun === erfin Mair (plural, singular erfinen Fair f) black bryony, lady's seal (Dioscorea communis, syn. Tamus communis) ==== Synonyms ==== cwlwm y coed === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “erfin Mair”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies