Declension table of ?rātavya

Masculine	Singular	Dual	Plural
Nominative	rātavyaḥ	rātavyau	rātavyāḥ
Vocative	rātavya	rātavyau	rātavyāḥ
Accusative	rātavyam	rātavyau	rātavyān
Instrumental	rātavyena	rātavyābhyām	rātavyaiḥ rātavyebhiḥ
Dative	rātavyāya	rātavyābhyām	rātavyebhyaḥ
Ablative	rātavyāt	rātavyābhyām	rātavyebhyaḥ
Genitive	rātavyasya	rātavyayoḥ	rātavyānām
Locative	rātavye	rātavyayoḥ	rātavyeṣu

Compound rātavya -

Adverb -rātavyam -rātavyāt