Declension table of ?manthitavya

Neuter	Singular	Dual	Plural
Nominative	manthitavyam	manthitavye	manthitavyāni
Vocative	manthitavya	manthitavye	manthitavyāni
Accusative	manthitavyam	manthitavye	manthitavyāni
Instrumental	manthitavyena	manthitavyābhyām	manthitavyaiḥ
Dative	manthitavyāya	manthitavyābhyām	manthitavyebhyaḥ
Ablative	manthitavyāt	manthitavyābhyām	manthitavyebhyaḥ
Genitive	manthitavyasya	manthitavyayoḥ	manthitavyānām
Locative	manthitavye	manthitavyayoḥ	manthitavyeṣu

Compound manthitavya -

Adverb -manthitavyam -manthitavyāt