Declension table of ?poṣṭavya

Masculine	Singular	Dual	Plural
Nominative	poṣṭavyaḥ	poṣṭavyau	poṣṭavyāḥ
Vocative	poṣṭavya	poṣṭavyau	poṣṭavyāḥ
Accusative	poṣṭavyam	poṣṭavyau	poṣṭavyān
Instrumental	poṣṭavyena	poṣṭavyābhyām	poṣṭavyaiḥ poṣṭavyebhiḥ
Dative	poṣṭavyāya	poṣṭavyābhyām	poṣṭavyebhyaḥ
Ablative	poṣṭavyāt	poṣṭavyābhyām	poṣṭavyebhyaḥ
Genitive	poṣṭavyasya	poṣṭavyayoḥ	poṣṭavyānām
Locative	poṣṭavye	poṣṭavyayoḥ	poṣṭavyeṣu

Compound poṣṭavya -

Adverb -poṣṭavyam -poṣṭavyāt