Reconstruction:Proto-Celtic/reidom

This Proto-Celtic entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

Proto-Celtic

Etymology

Noun

*reidom n

ride
course

Inflection

Neuter o-stem
	singular	dual	plural
nominative	*reidom	*reidou	*reidā
vocative	*reidom	*reidou	*reidā
accusative	*reidom	*reidou	*reidā
genitive	*reidī	*reidous	*reidom
dative	*reidūi	*reidobom	*reidobos
locative	*reidei	*?	*?
instrumental	*reidū	*reidobim	*reidūis

Derived terms

*ekʷo-reid-
- Middle Irish: echrad f (“yoked pair of steeds”)
  - Classical Gaelic: echradh
- ⇒ Gaulish: *eporēdiā
  - → Latin: Eporēdia
    - Piedmontese: Ivrèja
      - → French: Ivrée
      - → Italian: Ivrea
- ⇒ Gaulish: *Eporēdorīx
  - → Latin: Eporēdorīx

Descendants

Proto-Brythonic:
- Welsh: -rwydd (abstract noun suffix)
Old Irish: ríad (“ride”), -rad (collective noun suffix) (merged with *-retom)
- Middle Irish: ríad
Gaulish: *rēdā
- → Latin: raeda

Further reading

de Bernardo Stempel, Patrizia (1999) Nominale Wortbildung des älteren Irischen: Stammbildung und Derivation [Noun Formation in Old Irish: Stem-formation and derivation] (Buchreihe der Zeitschrift für celtische Philologie) (in German), volume 15, Tübingen: Niemeyer, →ISBN, pages 473-474
Delamarre, Xavier (2003) “redo-”, in Dictionnaire de la langue gauloise: une approche linguistique du vieux-celtique continental [Dictionary of the Gaulish language: A linguistic approach to Old Continental Celtic] (Collection des Hespérides; 9), 2nd edition, Éditions Errance, →ISBN, page 256
Thurneysen, Rudolf (1940) [1909] D. A. Binchy and Osborn Bergin, transl., A Grammar of Old Irish, Dublin Institute for Advanced Studies, translation of Handbuch des Alt-Irischen (in German), →ISBN, § 264; reprinted 2017