Probably from Proto-Indo-European *ǵʰl̥h₃stós, from *ǵʰelh₃- (“green, yellow”).[1][2]
*glastos
- green, blue
O/ā-stem
|
masculine
|
singular
|
dual
|
plural
|
nominative
|
*glastos
|
*glastou
|
*glastoi
|
vocative
|
*glaste
|
*glastou
|
*glastoi
|
accusative
|
*glastom
|
*glastou
|
*glastoms
|
genitive
|
*glastī
|
*glastous
|
*glastom
|
dative
|
*glastūi
|
*glastobom
|
*glastobos
|
instrumental
|
*glastū
|
*glastobim
|
*glastobis
|
feminine
|
singular
|
dual
|
plural
|
nominative
|
*glastā
|
*glastai
|
*glastās
|
vocative
|
*glastā
|
*glastai
|
*glastās
|
accusative
|
*glastam
|
*glastai
|
*glastams
|
genitive
|
*glastās
|
*glastous
|
*glastom
|
dative
|
*glastai
|
*glastābom
|
*glastābos
|
instrumental
|
*?
|
*glastābim
|
*glastābis
|
neuter
|
singular
|
dual
|
plural
|
nominative
|
*glastom
|
*glastou
|
*glastā
|
vocative
|
*glastom
|
*glastou
|
*glastā
|
accusative
|
*glastom
|
*glastou
|
*glastā
|
genitive
|
*glastī
|
*glastous
|
*glastom
|
dative
|
*glastūi
|
*glastobom
|
*glastobos
|
instrumental
|
*glastū
|
*glastobim
|
*glastobis
|
Declension of the comparative
|
masculine
|
singular
|
dual
|
plural
|
nominative
|
*glastyūs
|
*?
|
*glastyoses
|
vocative
|
*glastyūs
|
*?
|
*glastyoses
|
accusative
|
*glastyosam
|
*?
|
*glastyosams
|
genitive
|
*glastisos
|
*?
|
*glastisom
|
dative
|
*glastisei
|
*?
|
*glastisbos
|
instrumental
|
*glastisī
|
*?
|
*glastisbis
|
feminine
|
singular
|
dual
|
plural
|
nominative
|
*glastyūs
|
*?
|
*glastyoses
|
vocative
|
*glastyūs
|
*?
|
*glastyoses
|
accusative
|
*glastyosam
|
*?
|
*glastyosams
|
genitive
|
*glastisos
|
*?
|
*glastisom
|
dative
|
*glastisei
|
*?
|
*glastisbos
|
instrumental
|
*glastisī
|
*?
|
*glastisbis
|
neuter
|
singular
|
dual
|
plural
|
nominative
|
*glastis
|
*?
|
*?
|
vocative
|
*glastis
|
*?
|
*?
|
accusative
|
*glastis
|
*?
|
*?
|
genitive
|
*glastisos
|
*?
|
*glastisom
|
dative
|
*glastisei
|
*?
|
*glastisbos
|
instrumental
|
*glastisī
|
*?
|
*glastisbis
|
- ^ Matasović, Ranko (2009) Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN, page 160
- ^ Zair, Nicholas (2012) The reflexes of the Proto-Indo-European laryngeals in Celtic, Leiden: Brill, →ISBN, pages 74-75