Geiriadur Mawr, Y: Complete Welsh-English, English-Welsh Dictionary

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A Welsh-Russian/Russian-Welsh dictionary which was prepared by Dmitri Hrapof of Moscow. Technical terms

McNeir, Clive Leo (gol.), Cynulliad Cenedlaethol Cymru: Geiriadur Terminoleg Trefniadaeth: National Assembly for Wales Dictionary of Procedural Terms (Caerdydd/Cardiff, 1999).

Hughes, J. Elwyn, Canllawiau laith a Chymorth Sillafu (Bethesda, 1984) (a useful guide to spelling). Idem et al., Orgraff yr laith Gymraeg (Caerdydd, 1928 and subsequent editions) (the standard authority on the orthography).

An extensive searchable Welsh and English glossary which was prepared by the University of Wales Trinity Saint David Welsh Department at Lampeter. Bowen, John T., and Jones, T. J. Rhys, Teach Yourself Welsh (London, English UP, 1960). Cyflwyno’r laith Lenyddol (Y Bontfaen, 1978), compiled by Uned Iaith Genedlaethol Cymru (a useful guide to the literary language). Idem, Geiriadur Gomer i’r Ifanc (Llandysul, 1994) (excellent defining Welsh-Welsh dictionary with minimum English equivalents. Not just for the young!). Pŵer Niwclear – Geirfa o Dermau Technegol: Nuclear Power – Glossary of Technical Terms (Awdurdod Ynni Atomig/ United Kingdom Atomic Energy Authority, 1979).

Geiriadur Saesneg‑Cymraeg

The major Standard historical dictionary of Welsh which was prepared by the University of Wales between 1921 and 2002. A second edition is in preparation and the whole of both editions is available online at http://geiriadur.ac.uk/gpc/gpc.html where it is possible to search for Welsh and English words and phrases.

Pan yw traethiedydd y cymal enwol yn ddyfodol o ran ei berthynas ag amser traethiedydd y prif gymal, cyflwynir y cymal enwol gan y(r) a ddilynir gan ferf rediadol. Ceir y o flaen cytsain, yr o flaen llafariad ac h-: Thome, David A., A Comprehensive Welsh Grammar (Oxford, 1993). Idem, Gramadeg Cymraeg (Llandysul, 1996). Ceir na(d) o flaen y ferf mewn cymal enwol negyddol. Ceir na o flaen cytsain, nad o flaen llafariad. Dilynir na gan dreiglad llaes o c, p, t, a threiglad meddal o g, b, d, m, ll, rh: Diffinnir yr eirfa hon yn Gymraeg, ond rhoddir cyfystyron Saesneg yn ogystal. Rhoddir sylw manwl i ffurfiau amrywiol, cyfuniadau, a tharddiad geiriau. The European Dictionary Portal, curated by experts in the European Network of e-Lexicography, is a guide to good online dictionaries of European languages regardless of whether you are an academic, a translator, a language teacher or simply a language enthusiast.Griffiths, Hefin and Wiliam, Mary, Geiriadur Termau Cyfrifiadureg: Dictionary of Computer Terms (MEU Cymru, 1992). mae nifer o'r ieithoedd Ewropeaidd yn defnyddio'r cystrawen hwn / A number of European Languages use this form: Richards, Melville, Welsh Administrative and Territorial Units (Cardiff, University of Wales Press, 1969). A dictionary prepared by D. Geraint Lewis and Nudd Lewis which is in a beta version. You have to register to use it but it is currently free to use. Hayes, D. P. H., Planhigion Cymru a’r Byd (Kirkby in Ashfield, Notts, 1995) (flora of the world: Welsh, English and Latin names).