An Stòr-dàta Briathrachais Gàidhlig: http://www2.smo.uhi.ac.uk/gaidhlig/faclair/sbg/lorg.php
Dictionary of the Irish language: based mainly on old and middle Irish materials. (1913-1976). Dublin: Royal Irish Academy. Online at: http://edil.qub.ac.uk/dictionary/search.php
Ó Dónaill, Niall & De Bhaldraithe, Tomás (red.) (1977). Foclóir Gaeilge-Béarla. Baile Átha Cliath: An Rún.
Geiriadur Prifysgol Cymru: A Dictionary of the Welsh Language. http://welsh-dictionary.ac.uk/gpc/gpc.html
Robert Farren, PIE culture words collection, 2017
db-26584, WX59, WX61, WX63, WX67
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