Declension table of ?pūrvayāyin

Masculine	Singular	Dual	Plural
Nominative	pūrvayāyī	pūrvayāyiṇau	pūrvayāyiṇaḥ
Vocative	pūrvayāyin	pūrvayāyiṇau	pūrvayāyiṇaḥ
Accusative	pūrvayāyiṇam	pūrvayāyiṇau	pūrvayāyiṇaḥ
Instrumental	pūrvayāyiṇā	pūrvayāyibhyām	pūrvayāyibhiḥ
Dative	pūrvayāyiṇe	pūrvayāyibhyām	pūrvayāyibhyaḥ
Ablative	pūrvayāyiṇaḥ	pūrvayāyibhyām	pūrvayāyibhyaḥ
Genitive	pūrvayāyiṇaḥ	pūrvayāyiṇoḥ	pūrvayāyiṇām
Locative	pūrvayāyiṇi	pūrvayāyiṇoḥ	pūrvayāyiṣu

Compound pūrvayāyi -

Adverb -pūrvayāyi