Declension table of ?pratnavat

Masculine	Singular	Dual	Plural
Nominative	pratnavān	pratnavantau	pratnavantaḥ
Vocative	pratnavan	pratnavantau	pratnavantaḥ
Accusative	pratnavantam	pratnavantau	pratnavataḥ
Instrumental	pratnavatā	pratnavadbhyām	pratnavadbhiḥ
Dative	pratnavate	pratnavadbhyām	pratnavadbhyaḥ
Ablative	pratnavataḥ	pratnavadbhyām	pratnavadbhyaḥ
Genitive	pratnavataḥ	pratnavatoḥ	pratnavatām
Locative	pratnavati	pratnavatoḥ	pratnavatsu

Compound pratnavat -

Adverb -pratnavantam