Declension table of ?reṣṭavya

Neuter	Singular	Dual	Plural
Nominative	reṣṭavyam	reṣṭavye	reṣṭavyāni
Vocative	reṣṭavya	reṣṭavye	reṣṭavyāni
Accusative	reṣṭavyam	reṣṭavye	reṣṭavyāni
Instrumental	reṣṭavyena	reṣṭavyābhyām	reṣṭavyaiḥ
Dative	reṣṭavyāya	reṣṭavyābhyām	reṣṭavyebhyaḥ
Ablative	reṣṭavyāt	reṣṭavyābhyām	reṣṭavyebhyaḥ
Genitive	reṣṭavyasya	reṣṭavyayoḥ	reṣṭavyānām
Locative	reṣṭavye	reṣṭavyayoḥ	reṣṭavyeṣu

Compound reṣṭavya -

Adverb -reṣṭavyam -reṣṭavyāt