Declension table of ?tuviṣvan

Neuter	Singular	Dual	Plural
Nominative	tuviṣva	tuviṣvṇī tuviṣvaṇī	tuviṣvāṇi
Vocative	tuviṣvan tuviṣva	tuviṣvṇī tuviṣvaṇī	tuviṣvāṇi
Accusative	tuviṣva	tuviṣvṇī tuviṣvaṇī	tuviṣvāṇi
Instrumental	tuviṣvaṇā	tuviṣvabhyām	tuviṣvabhiḥ
Dative	tuviṣvaṇe	tuviṣvabhyām	tuviṣvabhyaḥ
Ablative	tuviṣvaṇaḥ	tuviṣvabhyām	tuviṣvabhyaḥ
Genitive	tuviṣvaṇaḥ	tuviṣvaṇoḥ	tuviṣvaṇām
Locative	tuviṣvaṇi	tuviṣvaṇoḥ	tuviṣvasu

Compound tuviṣva -

Adverb -tuviṣva -tuviṣvam