Throughout most of history, the grammatical structure of Glissia has remained largely constant. This can, in part, be attributed to the crisply philosophical nature of its core complement of determiners, prepositions, and other particles, a feature that can also be found to some extent in its basic vocabulary. The form presented here is that typical of the Trestunarion c. 71000 lky, which is highly mutually intelligible with the language in both written and spoken forms as far back as 32000 lky.

Syntax

Noun morphology

Cases. There are seven cases in Glissia, mirroring the eight of PIE without the instrumental case: nominative, vocative, accusative, dative, genitive, and the rare ablative and locative cases. Ablative and locative forms are typically only used in certain fossilized (or at least formulaic) situations, with genitive and dative endings being used the majority of the time.

Number. The dual number is not used in standard Glissia.

Thematic declension patterns. Glissia has four major thematic declension schemes: the -α, -ο, -ε, and -ι declensions. Retaining the three classical genders, each declension can form any of the three genders; these are readily recognized in the nominative form by a long vowel ending (feminine), a -ς ending (masculine), or a -ν ending (diminutive neuter). Notably, the -ις declension contains more neuter nouns, and the -ι declension is rarely if ever used.

The -ο declension
	nom	gen	voc	acc	dat	abl	loc
m sg	-ος	-ου	-ω	-ο	-ις	-η	-ῑ
m pl	-οι	-αν	-ῳ	-οις	-ους	-ης	-ῑ
n sg
n pl
f sg
f pl

The -α declension
	nom	gen	voc	acc	dat	abl	loc
m sg
m pl
n sg
n pl
f sg	-ᾱ	-αε	-η	-ου	-ις	-η	-ῑ
f pl	-αι	-αυν	-ᾱϊ	-αις	-ᾱς	-ῑς	-ῑ

The -ε declension
	nom	gen	voc	acc	dat	abl	loc
m sg	-ες	-ον	-η	-ου	-ις	-η	-ῑ
m pl	-ει	-οιν	-ει	-εις	-ης	-ης	-ῑ
n sg
n pl
f sg
f pl

The -ι declension
	nom	gen	voc	acc	dat	abl	loc
m sg	-ις	-αε	-η	-ις	-ης	-ης	-ῑ
m pl	-ῑ	-ειν	-ες	-ῑϊς	-ῑς	-ῑς	-ῑ
n sg
n pl
f sg
f pl

Athematic declensions. Regularization has driven these patterns almost to extinction, although some words still exist with unusual, consonantal forms.

Adjective morphology

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The definite article

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Verb morphology

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Adverb morphology

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The logical copula

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Annotation particles

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Numbers

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