Declension table of ?pratyastamaya

Masculine	Singular	Dual	Plural
Nominative	pratyastamayaḥ	pratyastamayau	pratyastamayāḥ
Vocative	pratyastamaya	pratyastamayau	pratyastamayāḥ
Accusative	pratyastamayam	pratyastamayau	pratyastamayān
Instrumental	pratyastamayena	pratyastamayābhyām	pratyastamayaiḥ pratyastamayebhiḥ
Dative	pratyastamayāya	pratyastamayābhyām	pratyastamayebhyaḥ
Ablative	pratyastamayāt	pratyastamayābhyām	pratyastamayebhyaḥ
Genitive	pratyastamayasya	pratyastamayayoḥ	pratyastamayānām
Locative	pratyastamaye	pratyastamayayoḥ	pratyastamayeṣu

Compound pratyastamaya -

Adverb -pratyastamayam -pratyastamayāt