Reconstruction:Proto-Celtic/yestu

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

From Proto-Indo-European *yes-tu, extended form of *yes-.

Noun

*yestu n

1. boiling

Inflection

Neuter u-stem
	singular	dual	plural
nominative	*yestu	*yestū	*yestwā
vocative	*yestu	*yestū	*yestwā
accusative	*yestu	*yestū	*yestwā
genitive	*yestous	*yestous	*yestowom
dative	*yestou	*yestubom	*yestubos
locative	*?	*?	*?
instrumental	*yestū	*yestubim	*yestubis

Descendants

• Proto-Brythonic: *jas
  • Middle Welsh: ias
    • Welsh: ias
• Old Irish: es n
  • Middle Irish: es, ess