Declension table of ?tresivas

Neuter	Singular	Dual	Plural
Nominative	tresivat	tresuṣī	tresivāṃsi
Vocative	tresivat	tresuṣī	tresivāṃsi
Accusative	tresivat	tresuṣī	tresivāṃsi
Instrumental	tresuṣā	tresivadbhyām	tresivadbhiḥ
Dative	tresuṣe	tresivadbhyām	tresivadbhyaḥ
Ablative	tresuṣaḥ	tresivadbhyām	tresivadbhyaḥ
Genitive	tresuṣaḥ	tresuṣoḥ	tresuṣām
Locative	tresuṣi	tresuṣoḥ	tresivatsu

Compound tresivat -

Adverb -tresivas