Declension table of ?pūrvāyus

Masculine	Singular	Dual	Plural
Nominative	pūrvāyuḥ	pūrvāyuṣau	pūrvāyuṣaḥ
Vocative	pūrvāyuḥ	pūrvāyuṣau	pūrvāyuṣaḥ
Accusative	pūrvāyuṣam	pūrvāyuṣau	pūrvāyuṣaḥ
Instrumental	pūrvāyuṣā	pūrvāyurbhyām	pūrvāyurbhiḥ
Dative	pūrvāyuṣe	pūrvāyurbhyām	pūrvāyurbhyaḥ
Ablative	pūrvāyuṣaḥ	pūrvāyurbhyām	pūrvāyurbhyaḥ
Genitive	pūrvāyuṣaḥ	pūrvāyuṣoḥ	pūrvāyuṣām
Locative	pūrvāyuṣi	pūrvāyuṣoḥ	pūrvāyuḥṣu

Compound pūrvāyus -

Adverb -pūrvāyus