Declension table of ?ṛtavyātva

Neuter	Singular	Dual	Plural
Nominative	ṛtavyātvam	ṛtavyātve	ṛtavyātvāni
Vocative	ṛtavyātva	ṛtavyātve	ṛtavyātvāni
Accusative	ṛtavyātvam	ṛtavyātve	ṛtavyātvāni
Instrumental	ṛtavyātvena	ṛtavyātvābhyām	ṛtavyātvaiḥ
Dative	ṛtavyātvāya	ṛtavyātvābhyām	ṛtavyātvebhyaḥ
Ablative	ṛtavyātvāt	ṛtavyātvābhyām	ṛtavyātvebhyaḥ
Genitive	ṛtavyātvasya	ṛtavyātvayoḥ	ṛtavyātvānām
Locative	ṛtavyātve	ṛtavyātvayoḥ	ṛtavyātveṣu

Compound ṛtavyātva -

Adverb -ṛtavyātvam -ṛtavyātvāt