Declension table of ?dhrastavat

Masculine	Singular	Dual	Plural
Nominative	dhrastavān	dhrastavantau	dhrastavantaḥ
Vocative	dhrastavan	dhrastavantau	dhrastavantaḥ
Accusative	dhrastavantam	dhrastavantau	dhrastavataḥ
Instrumental	dhrastavatā	dhrastavadbhyām	dhrastavadbhiḥ
Dative	dhrastavate	dhrastavadbhyām	dhrastavadbhyaḥ
Ablative	dhrastavataḥ	dhrastavadbhyām	dhrastavadbhyaḥ
Genitive	dhrastavataḥ	dhrastavatoḥ	dhrastavatām
Locative	dhrastavati	dhrastavatoḥ	dhrastavatsu

Compound dhrastavat -

Adverb -dhrastavantam