Declension table of ?tāntavya

Masculine	Singular	Dual	Plural
Nominative	tāntavyaḥ	tāntavyau	tāntavyāḥ
Vocative	tāntavya	tāntavyau	tāntavyāḥ
Accusative	tāntavyam	tāntavyau	tāntavyān
Instrumental	tāntavyena	tāntavyābhyām	tāntavyaiḥ tāntavyebhiḥ
Dative	tāntavyāya	tāntavyābhyām	tāntavyebhyaḥ
Ablative	tāntavyāt	tāntavyābhyām	tāntavyebhyaḥ
Genitive	tāntavyasya	tāntavyayoḥ	tāntavyānām
Locative	tāntavye	tāntavyayoḥ	tāntavyeṣu

Compound tāntavya -

Adverb -tāntavyam -tāntavyāt