Declension table of ?tadanvaya

Neuter	Singular	Dual	Plural
Nominative	tadanvayam	tadanvaye	tadanvayāni
Vocative	tadanvaya	tadanvaye	tadanvayāni
Accusative	tadanvayam	tadanvaye	tadanvayāni
Instrumental	tadanvayena	tadanvayābhyām	tadanvayaiḥ
Dative	tadanvayāya	tadanvayābhyām	tadanvayebhyaḥ
Ablative	tadanvayāt	tadanvayābhyām	tadanvayebhyaḥ
Genitive	tadanvayasya	tadanvayayoḥ	tadanvayānām
Locative	tadanvaye	tadanvayayoḥ	tadanvayeṣu

Compound tadanvaya -

Adverb -tadanvayam -tadanvayāt