Declension table of ?māntavya

Masculine	Singular	Dual	Plural
Nominative	māntavyaḥ	māntavyau	māntavyāḥ
Vocative	māntavya	māntavyau	māntavyāḥ
Accusative	māntavyam	māntavyau	māntavyān
Instrumental	māntavyena	māntavyābhyām	māntavyaiḥ māntavyebhiḥ
Dative	māntavyāya	māntavyābhyām	māntavyebhyaḥ
Ablative	māntavyāt	māntavyābhyām	māntavyebhyaḥ
Genitive	māntavyasya	māntavyayoḥ	māntavyānām
Locative	māntavye	māntavyayoḥ	māntavyeṣu

Compound māntavya -

Adverb -māntavyam -māntavyāt