Declension table of ?tatṛṣvas

Neuter	Singular	Dual	Plural
Nominative	tatṛṣvat	tatṛṣuṣī	tatṛṣvāṃsi
Vocative	tatṛṣvat	tatṛṣuṣī	tatṛṣvāṃsi
Accusative	tatṛṣvat	tatṛṣuṣī	tatṛṣvāṃsi
Instrumental	tatṛṣuṣā	tatṛṣvadbhyām	tatṛṣvadbhiḥ
Dative	tatṛṣuṣe	tatṛṣvadbhyām	tatṛṣvadbhyaḥ
Ablative	tatṛṣuṣaḥ	tatṛṣvadbhyām	tatṛṣvadbhyaḥ
Genitive	tatṛṣuṣaḥ	tatṛṣuṣoḥ	tatṛṣuṣām
Locative	tatṛṣuṣi	tatṛṣuṣoḥ	tatṛṣvatsu

Compound tatṛṣvat -

Adverb -tatṛṣvat