trewyn

== Welsh == === Etymology 1 === Back-formation from athrywynu and ethrywynu (“to reconcile”). ==== Verb ==== trewyn (first-person singular present trewynaf) alternative form of trewynu (“to arbitrate, to mediate”) ==== Further reading ==== R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “trewyn”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies === Etymology 2 === Nominalisation of etymology 1, a calque of English loosestrife, from Ancient Greek λυσιμάχειον (lusimákheion), as if from λύσις (lúsis, “loosening”) + μάχη (mákhē, “battle, strife”). ==== Noun ==== trewyn (plural, singular trewynyn m) loosestrife (Lysimachia) especially yellow loosestrife (Lysimachia vulgaris) Synonyms: milwyr melynion, llysiau'r milwyr melynion yellow pimpernel (Lysimachia nemorum) Synonym: gwlydd melyn Mair ===== Derived terms ===== trewyn ymlusgaidd (“creeping jenny”) ==== Further reading ==== Cymdeithas Edward Llwyd (2016), “Y Bywiadur”, in Llên natur‎[1], retrieved 25 May 2025 D. G. Lewis, N. Lewis, editors (2005–present), “trewyn”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “trewynyn”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies === Mutation ===