Declension table of ?tathāvrata

Neuter	Singular	Dual	Plural
Nominative	tathāvratam	tathāvrate	tathāvratāni
Vocative	tathāvrata	tathāvrate	tathāvratāni
Accusative	tathāvratam	tathāvrate	tathāvratāni
Instrumental	tathāvratena	tathāvratābhyām	tathāvrataiḥ
Dative	tathāvratāya	tathāvratābhyām	tathāvratebhyaḥ
Ablative	tathāvratāt	tathāvratābhyām	tathāvratebhyaḥ
Genitive	tathāvratasya	tathāvratayoḥ	tathāvratānām
Locative	tathāvrate	tathāvratayoḥ	tathāvrateṣu

Compound tathāvrata -

Adverb -tathāvratam -tathāvratāt