Declension table of ?pūrvasvara

Masculine	Singular	Dual	Plural
Nominative	pūrvasvaraḥ	pūrvasvarau	pūrvasvarāḥ
Vocative	pūrvasvara	pūrvasvarau	pūrvasvarāḥ
Accusative	pūrvasvaram	pūrvasvarau	pūrvasvarān
Instrumental	pūrvasvareṇa	pūrvasvarābhyām	pūrvasvaraiḥ pūrvasvarebhiḥ
Dative	pūrvasvarāya	pūrvasvarābhyām	pūrvasvarebhyaḥ
Ablative	pūrvasvarāt	pūrvasvarābhyām	pūrvasvarebhyaḥ
Genitive	pūrvasvarasya	pūrvasvarayoḥ	pūrvasvarāṇām
Locative	pūrvasvare	pūrvasvarayoḥ	pūrvasvareṣu

Compound pūrvasvara -

Adverb -pūrvasvaram -pūrvasvarāt