Declension table of ?drotavya

Masculine	Singular	Dual	Plural
Nominative	drotavyaḥ	drotavyau	drotavyāḥ
Vocative	drotavya	drotavyau	drotavyāḥ
Accusative	drotavyam	drotavyau	drotavyān
Instrumental	drotavyena	drotavyābhyām	drotavyaiḥ drotavyebhiḥ
Dative	drotavyāya	drotavyābhyām	drotavyebhyaḥ
Ablative	drotavyāt	drotavyābhyām	drotavyebhyaḥ
Genitive	drotavyasya	drotavyayoḥ	drotavyānām
Locative	drotavye	drotavyayoḥ	drotavyeṣu

Compound drotavya -

Adverb -drotavyam -drotavyāt