Declension table of ?roṣṭavya

Masculine	Singular	Dual	Plural
Nominative	roṣṭavyaḥ	roṣṭavyau	roṣṭavyāḥ
Vocative	roṣṭavya	roṣṭavyau	roṣṭavyāḥ
Accusative	roṣṭavyam	roṣṭavyau	roṣṭavyān
Instrumental	roṣṭavyena	roṣṭavyābhyām	roṣṭavyaiḥ roṣṭavyebhiḥ
Dative	roṣṭavyāya	roṣṭavyābhyām	roṣṭavyebhyaḥ
Ablative	roṣṭavyāt	roṣṭavyābhyām	roṣṭavyebhyaḥ
Genitive	roṣṭavyasya	roṣṭavyayoḥ	roṣṭavyānām
Locative	roṣṭavye	roṣṭavyayoḥ	roṣṭavyeṣu

Compound roṣṭavya -

Adverb -roṣṭavyam -roṣṭavyāt