Declension table of ?uṣṭavat

Masculine	Singular	Dual	Plural
Nominative	uṣṭavān	uṣṭavantau	uṣṭavantaḥ
Vocative	uṣṭavan	uṣṭavantau	uṣṭavantaḥ
Accusative	uṣṭavantam	uṣṭavantau	uṣṭavataḥ
Instrumental	uṣṭavatā	uṣṭavadbhyām	uṣṭavadbhiḥ
Dative	uṣṭavate	uṣṭavadbhyām	uṣṭavadbhyaḥ
Ablative	uṣṭavataḥ	uṣṭavadbhyām	uṣṭavadbhyaḥ
Genitive	uṣṭavataḥ	uṣṭavatoḥ	uṣṭavatām
Locative	uṣṭavati	uṣṭavatoḥ	uṣṭavatsu

Compound uṣṭavat -

Adverb -uṣṭavantam