Reconstruction:Proto-Celtic/adastos

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 *ad- (“law, custom”) followed by an obscure second element.

Pedersen thinks the second element -ast- is an incarnation of the common -st- noun formant, but -st- suffixes are generally never adjectival.
Matasović erroneously reconstructs the ending as -estus.^[1] This reconstruction is incorrect because the suffix cannot have had an -e-, as demonstrated by Brittonic suffixal -a-.
Hamp derives the second element from a Celtic counterpart to Latin astō (“to be present, stand by”).^[2]

Adjective

*adastos^[3]

suitable, fitting, proper

Inflection

O/ā-stem
masculine	singular	dual	plural
nominative	*adastos	*adastou	*adastoi
vocative	*adaste	*adastou	*adastoi
accusative	*adastom	*adastou	*adastons
genitive	*adastī	*adastous	*adastom
dative	*adastūi	*adastobom	*adastobos
instrumental	*adastū	*adastobim	*adastobis
feminine	singular	dual	plural
nominative	*adastā	*adastai	*adastās
vocative	*adastā	*adastai	*adastās
accusative	*adastam	*adastai	*adastans
genitive	*adastās	*adastous	*adastom
dative	*adastai	*adastābom	*adastābos
instrumental	*?	*adastābim	*adastābis
neuter	singular	dual	plural
nominative	*adastom	*adastou	*adastā
vocative	*adastom	*adastou	*adastā
accusative	*adastom	*adastou	*adastā
genitive	*adastī	*adastous	*adastom
dative	*adastūi	*adastobom	*adastobos
instrumental	*adastū	*adastobim	*adastobis

Declension of the comparative
masculine	singular	dual	plural
nominative	*adastyūs	*?	*adastyoses
vocative	*adastyūs	*?	*adastyoses
accusative	*adastyosam	*?	*adastyosans
genitive	*adastisos	*?	*adastisom
dative	*adastisei	*?	*adastisbos
instrumental	*adastisī	*?	*adastisbis
feminine	singular	dual	plural
nominative	*adastyūs	*?	*adastyoses
vocative	*adastyūs	*?	*adastyoses
accusative	*adastyosam	*?	*adastyosans
genitive	*adastisos	*?	*adastisom
dative	*adastisei	*?	*adastisbos
instrumental	*adastisī	*?	*adastisbis
neuter	singular	dual	plural
nominative	*adastis	*?	*?
vocative	*adastis	*?	*?
accusative	*adastis	*?	*?
genitive	*adastisos	*?	*adastisom
dative	*adastisei	*?	*adastisbos
instrumental	*adastisī	*?	*adastisbis

Derived terms

*komadastos

Descendants

Proto-Brythonic: *aðas
- Old Breton: adas
- Middle Welsh: adas
  - Welsh: addas
Old Irish: adas

References

^ Matasović, Ranko (2009) “*ad(u)-”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN, page 26
^ Hamp, Eric (1976) “Notes on Old Breton”, in Études Celtiques, volume 15, number 1, →DOI, →ISSN, pages 191–193
^ Falileyev, Alexander (2000) “cimadas”, in Etymological Glossary of Old Welsh (Buchreihe der Zeitschrift für celtische Philologie; 18), Walter de Gruyter, →ISBN, page 29

[1] Matasović, Ranko (2009) “*ad(u)-”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN, page 26

[2] Hamp, Eric (1976) “Notes on Old Breton”, in Études Celtiques, volume 15, number 1, →DOI, →ISSN, pages 191–193

[3] Falileyev, Alexander (2000) “cimadas”, in Etymological Glossary of Old Welsh (Buchreihe der Zeitschrift für celtische Philologie; 18), Walter de Gruyter, →ISBN, page 29

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