Declension table of ?pharvitavya

Neuter	Singular	Dual	Plural
Nominative	pharvitavyam	pharvitavye	pharvitavyāni
Vocative	pharvitavya	pharvitavye	pharvitavyāni
Accusative	pharvitavyam	pharvitavye	pharvitavyāni
Instrumental	pharvitavyena	pharvitavyābhyām	pharvitavyaiḥ
Dative	pharvitavyāya	pharvitavyābhyām	pharvitavyebhyaḥ
Ablative	pharvitavyāt	pharvitavyābhyām	pharvitavyebhyaḥ
Genitive	pharvitavyasya	pharvitavyayoḥ	pharvitavyānām
Locative	pharvitavye	pharvitavyayoḥ	pharvitavyeṣu

Compound pharvitavya -

Adverb -pharvitavyam -pharvitavyāt