Declension table of ?poṣṭavya

Neuter	Singular	Dual	Plural
Nominative	poṣṭavyam	poṣṭavye	poṣṭavyāni
Vocative	poṣṭavya	poṣṭavye	poṣṭavyāni
Accusative	poṣṭavyam	poṣṭavye	poṣṭavyāni
Instrumental	poṣṭavyena	poṣṭavyābhyām	poṣṭavyaiḥ
Dative	poṣṭavyāya	poṣṭavyābhyām	poṣṭavyebhyaḥ
Ablative	poṣṭavyāt	poṣṭavyābhyām	poṣṭavyebhyaḥ
Genitive	poṣṭavyasya	poṣṭavyayoḥ	poṣṭavyānām
Locative	poṣṭavye	poṣṭavyayoḥ	poṣṭavyeṣu

Compound poṣṭavya -

Adverb -poṣṭavyam -poṣṭavyāt