Declension table of ?pūrvasū

Masculine	Singular	Dual	Plural
Nominative	pūrvasūḥ	pūrvasuvau	pūrvasuvaḥ
Vocative	pūrvasūḥ pūrvasu	pūrvasuvau	pūrvasuvaḥ
Accusative	pūrvasuvam	pūrvasuvau	pūrvasuvaḥ
Instrumental	pūrvasuvā	pūrvasūbhyām	pūrvasūbhiḥ
Dative	pūrvasuvai pūrvasuve	pūrvasūbhyām	pūrvasūbhyaḥ
Ablative	pūrvasuvāḥ pūrvasuvaḥ	pūrvasūbhyām	pūrvasūbhyaḥ
Genitive	pūrvasuvāḥ pūrvasuvaḥ	pūrvasuvoḥ	pūrvasūnām pūrvasuvām
Locative	pūrvasuvi pūrvasuvām	pūrvasuvoḥ	pūrvasūṣu

Compound pūrvasū -

Adverb -pūrvasu