Declension table of ?astya

Neuter	Singular	Dual	Plural
Nominative	astyam	astye	astyāni
Vocative	astya	astye	astyāni
Accusative	astyam	astye	astyāni
Instrumental	astyena	astyābhyām	astyaiḥ
Dative	astyāya	astyābhyām	astyebhyaḥ
Ablative	astyāt	astyābhyām	astyebhyaḥ
Genitive	astyasya	astyayoḥ	astyānām
Locative	astye	astyayoḥ	astyeṣu

Compound astya -

Adverb -astyam -astyāt