Declension table of ?prahartavya

Neuter	Singular	Dual	Plural
Nominative	prahartavyam	prahartavye	prahartavyāni
Vocative	prahartavya	prahartavye	prahartavyāni
Accusative	prahartavyam	prahartavye	prahartavyāni
Instrumental	prahartavyena	prahartavyābhyām	prahartavyaiḥ
Dative	prahartavyāya	prahartavyābhyām	prahartavyebhyaḥ
Ablative	prahartavyāt	prahartavyābhyām	prahartavyebhyaḥ
Genitive	prahartavyasya	prahartavyayoḥ	prahartavyānām
Locative	prahartavye	prahartavyayoḥ	prahartavyeṣu

Compound prahartavya -

Adverb -prahartavyam -prahartavyāt