Reconstruction:Proto-Celtic/reyatrom

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.

From some form of Proto-Indo-European *h₃reyH- (“to flow”) + *-trom.

*reyatrom n^[1][2][3]

1. torrent

• *riyatrom^[4][5]

• It is unknown why Old Irish riathor is masculine in the Milan glosses; generally all other *-trom nouns appear as expected neuters in Old Irish.
• The exact root and suffix allomorphs leading to the Proto-Celtic word are disputed; Schrijver and Matasović prefer a zero-grade root and an extra -e- between root and suffix. Meanwhile, McCone, Koch and Irslinger go with the e-grade of the root and presume the laryngeal would be vocalized as a (an assumption that is denied by Matasović, who believes the laryngeal would be lost).

• Proto-Brythonic:
  • Old Welsh: reatir
    • Middle Welsh: raeadyr, rayadyr
      • Welsh: rhaeadr
• Old Irish: riathor m, riathar
  • Middle Irish: riathar