Declension table of ?naṣṭavat

Masculine	Singular	Dual	Plural
Nominative	naṣṭavān	naṣṭavantau	naṣṭavantaḥ
Vocative	naṣṭavan	naṣṭavantau	naṣṭavantaḥ
Accusative	naṣṭavantam	naṣṭavantau	naṣṭavataḥ
Instrumental	naṣṭavatā	naṣṭavadbhyām	naṣṭavadbhiḥ
Dative	naṣṭavate	naṣṭavadbhyām	naṣṭavadbhyaḥ
Ablative	naṣṭavataḥ	naṣṭavadbhyām	naṣṭavadbhyaḥ
Genitive	naṣṭavataḥ	naṣṭavatoḥ	naṣṭavatām
Locative	naṣṭavati	naṣṭavatoḥ	naṣṭavatsu

Compound naṣṭavat -

Adverb -naṣṭavantam