Declension table of ?dvartavya

Masculine	Singular	Dual	Plural
Nominative	dvartavyaḥ	dvartavyau	dvartavyāḥ
Vocative	dvartavya	dvartavyau	dvartavyāḥ
Accusative	dvartavyam	dvartavyau	dvartavyān
Instrumental	dvartavyena	dvartavyābhyām	dvartavyaiḥ dvartavyebhiḥ
Dative	dvartavyāya	dvartavyābhyām	dvartavyebhyaḥ
Ablative	dvartavyāt	dvartavyābhyām	dvartavyebhyaḥ
Genitive	dvartavyasya	dvartavyayoḥ	dvartavyānām
Locative	dvartavye	dvartavyayoḥ	dvartavyeṣu

Compound dvartavya -

Adverb -dvartavyam -dvartavyāt