Declension table of ?hyastya

Masculine	Singular	Dual	Plural
Nominative	hyastyaḥ	hyastyau	hyastyāḥ
Vocative	hyastya	hyastyau	hyastyāḥ
Accusative	hyastyam	hyastyau	hyastyān
Instrumental	hyastyena	hyastyābhyām	hyastyaiḥ hyastyebhiḥ
Dative	hyastyāya	hyastyābhyām	hyastyebhyaḥ
Ablative	hyastyāt	hyastyābhyām	hyastyebhyaḥ
Genitive	hyastyasya	hyastyayoḥ	hyastyānām
Locative	hyastye	hyastyayoḥ	hyastyeṣu

Compound hyastya -

Adverb -hyastyam -hyastyāt