Declension table of ?drātavya

Masculine	Singular	Dual	Plural
Nominative	drātavyaḥ	drātavyau	drātavyāḥ
Vocative	drātavya	drātavyau	drātavyāḥ
Accusative	drātavyam	drātavyau	drātavyān
Instrumental	drātavyena	drātavyābhyām	drātavyaiḥ drātavyebhiḥ
Dative	drātavyāya	drātavyābhyām	drātavyebhyaḥ
Ablative	drātavyāt	drātavyābhyām	drātavyebhyaḥ
Genitive	drātavyasya	drātavyayoḥ	drātavyānām
Locative	drātavye	drātavyayoḥ	drātavyeṣu

Compound drātavya -

Adverb -drātavyam -drātavyāt