Declension table of astavyasta

Neuter	Singular	Dual	Plural
Nominative	astavyastam	astavyaste	astavyastāni
Vocative	astavyasta	astavyaste	astavyastāni
Accusative	astavyastam	astavyaste	astavyastāni
Instrumental	astavyastena	astavyastābhyām	astavyastaiḥ
Dative	astavyastāya	astavyastābhyām	astavyastebhyaḥ
Ablative	astavyastāt	astavyastābhyām	astavyastebhyaḥ
Genitive	astavyastasya	astavyastayoḥ	astavyastānām
Locative	astavyaste	astavyastayoḥ	astavyasteṣu

Compound astavyasta -

Adverb -astavyastam -astavyastāt