Declension table of ?grastavat

Masculine	Singular	Dual	Plural
Nominative	grastavān	grastavantau	grastavantaḥ
Vocative	grastavan	grastavantau	grastavantaḥ
Accusative	grastavantam	grastavantau	grastavataḥ
Instrumental	grastavatā	grastavadbhyām	grastavadbhiḥ
Dative	grastavate	grastavadbhyām	grastavadbhyaḥ
Ablative	grastavataḥ	grastavadbhyām	grastavadbhyaḥ
Genitive	grastavataḥ	grastavatoḥ	grastavatām
Locative	grastavati	grastavatoḥ	grastavatsu

Compound grastavat -

Adverb -grastavantam