Declension table of ?geṣṭavat

Masculine	Singular	Dual	Plural
Nominative	geṣṭavān	geṣṭavantau	geṣṭavantaḥ
Vocative	geṣṭavan	geṣṭavantau	geṣṭavantaḥ
Accusative	geṣṭavantam	geṣṭavantau	geṣṭavataḥ
Instrumental	geṣṭavatā	geṣṭavadbhyām	geṣṭavadbhiḥ
Dative	geṣṭavate	geṣṭavadbhyām	geṣṭavadbhyaḥ
Ablative	geṣṭavataḥ	geṣṭavadbhyām	geṣṭavadbhyaḥ
Genitive	geṣṭavataḥ	geṣṭavatoḥ	geṣṭavatām
Locative	geṣṭavati	geṣṭavatoḥ	geṣṭavatsu

Compound geṣṭavat -

Adverb -geṣṭavantam