Declension table of ?pratyāsvara

Masculine	Singular	Dual	Plural
Nominative	pratyāsvaraḥ	pratyāsvarau	pratyāsvarāḥ
Vocative	pratyāsvara	pratyāsvarau	pratyāsvarāḥ
Accusative	pratyāsvaram	pratyāsvarau	pratyāsvarān
Instrumental	pratyāsvareṇa	pratyāsvarābhyām	pratyāsvaraiḥ pratyāsvarebhiḥ
Dative	pratyāsvarāya	pratyāsvarābhyām	pratyāsvarebhyaḥ
Ablative	pratyāsvarāt	pratyāsvarābhyām	pratyāsvarebhyaḥ
Genitive	pratyāsvarasya	pratyāsvarayoḥ	pratyāsvarāṇām
Locative	pratyāsvare	pratyāsvarayoḥ	pratyāsvareṣu

Compound pratyāsvara -

Adverb -pratyāsvaram -pratyāsvarāt