Declension table of ?hastadvaya

Neuter	Singular	Dual	Plural
Nominative	hastadvayam	hastadvaye	hastadvayāni
Vocative	hastadvaya	hastadvaye	hastadvayāni
Accusative	hastadvayam	hastadvaye	hastadvayāni
Instrumental	hastadvayena	hastadvayābhyām	hastadvayaiḥ
Dative	hastadvayāya	hastadvayābhyām	hastadvayebhyaḥ
Ablative	hastadvayāt	hastadvayābhyām	hastadvayebhyaḥ
Genitive	hastadvayasya	hastadvayayoḥ	hastadvayānām
Locative	hastadvaye	hastadvayayoḥ	hastadvayeṣu

Compound hastadvaya -

Adverb -hastadvayam -hastadvayāt