Attested in the compound cairrḟiad m. 'stag': carr- 'deer (?)' (possible loan from Welsh? cf. MW carw, MBret. caru, OCo. caruu 'deer') < PCelt. *karwo- m. ‘deer’ < PIE *ḱer-n-, *ḱerh₂- 'horn' & fia, fiad 'wilderness, woodland; wild animal, game, esp. deer' < PCelt. *widu- ‘wood’ < PIE *widhu- 'wood'. Fiad is a common term for 'deer' in Old Irish, meaning that the first element in this compound may be somewhat redundant.The Welsh Academy's dictionary (GYA) lists several Welsh words for deer, with carw specifically denoting red deer. Before the Norman conquest, red deer were the only deer species in Ireland.
Robert Farren. Native speaker of English. Conductor of LUNDIC project-internal analysis of Indo-European culture data.
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
Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online: http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/content/proto-celtic/index.html
Griffiths, Bruce & Dafydd Glyn Jones. Geiriadur yr Academi, the Welsh Academy English-Welsh Dictionary Online. http://geiriaduracademi.org/?lang=en
Robert Farren, PIE culture words collection, 2017
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