Declension table of pūrvaka

Masculine	Singular	Dual	Plural
Nominative	pūrvakaḥ	pūrvakau	pūrvakāḥ
Vocative	pūrvaka	pūrvakau	pūrvakāḥ
Accusative	pūrvakam	pūrvakau	pūrvakān
Instrumental	pūrvakeṇa	pūrvakābhyām	pūrvakaiḥ pūrvakebhiḥ
Dative	pūrvakāya	pūrvakābhyām	pūrvakebhyaḥ
Ablative	pūrvakāt	pūrvakābhyām	pūrvakebhyaḥ
Genitive	pūrvakasya	pūrvakayoḥ	pūrvakāṇām
Locative	pūrvake	pūrvakayoḥ	pūrvakeṣu

Compound pūrvaka -

Adverb -pūrvakam -pūrvakāt