Declension table of ?vṛthātva

Neuter	Singular	Dual	Plural
Nominative	vṛthātvam	vṛthātve	vṛthātvāni
Vocative	vṛthātva	vṛthātve	vṛthātvāni
Accusative	vṛthātvam	vṛthātve	vṛthātvāni
Instrumental	vṛthātvena	vṛthātvābhyām	vṛthātvaiḥ
Dative	vṛthātvāya	vṛthātvābhyām	vṛthātvebhyaḥ
Ablative	vṛthātvāt	vṛthātvābhyām	vṛthātvebhyaḥ
Genitive	vṛthātvasya	vṛthātvayoḥ	vṛthātvānām
Locative	vṛthātve	vṛthātvayoḥ	vṛthātveṣu

Compound vṛthātva -

Adverb -vṛthātvam -vṛthātvāt