Declension table of ?heṣṭavat

Masculine	Singular	Dual	Plural
Nominative	heṣṭavān	heṣṭavantau	heṣṭavantaḥ
Vocative	heṣṭavan	heṣṭavantau	heṣṭavantaḥ
Accusative	heṣṭavantam	heṣṭavantau	heṣṭavataḥ
Instrumental	heṣṭavatā	heṣṭavadbhyām	heṣṭavadbhiḥ
Dative	heṣṭavate	heṣṭavadbhyām	heṣṭavadbhyaḥ
Ablative	heṣṭavataḥ	heṣṭavadbhyām	heṣṭavadbhyaḥ
Genitive	heṣṭavataḥ	heṣṭavatoḥ	heṣṭavatām
Locative	heṣṭavati	heṣṭavatoḥ	heṣṭavatsu

Compound heṣṭavat -

Adverb -heṣṭavantam