Declension table of ?pratyasta

Masculine	Singular	Dual	Plural
Nominative	pratyastaḥ	pratyastau	pratyastāḥ
Vocative	pratyasta	pratyastau	pratyastāḥ
Accusative	pratyastam	pratyastau	pratyastān
Instrumental	pratyastena	pratyastābhyām	pratyastaiḥ pratyastebhiḥ
Dative	pratyastāya	pratyastābhyām	pratyastebhyaḥ
Ablative	pratyastāt	pratyastābhyām	pratyastebhyaḥ
Genitive	pratyastasya	pratyastayoḥ	pratyastānām
Locative	pratyaste	pratyastayoḥ	pratyasteṣu

Compound pratyasta -

Adverb -pratyastam -pratyastāt