Declension table of ?tathyavādin

Neuter	Singular	Dual	Plural
Nominative	tathyavādi	tathyavādinī	tathyavādīni
Vocative	tathyavādin tathyavādi	tathyavādinī	tathyavādīni
Accusative	tathyavādi	tathyavādinī	tathyavādīni
Instrumental	tathyavādinā	tathyavādibhyām	tathyavādibhiḥ
Dative	tathyavādine	tathyavādibhyām	tathyavādibhyaḥ
Ablative	tathyavādinaḥ	tathyavādibhyām	tathyavādibhyaḥ
Genitive	tathyavādinaḥ	tathyavādinoḥ	tathyavādinām
Locative	tathyavādini	tathyavādinoḥ	tathyavādiṣu

Compound tathyavādi -

Adverb -tathyavādi