Declension table of ?pratyupeya

Masculine	Singular	Dual	Plural
Nominative	pratyupeyaḥ	pratyupeyau	pratyupeyāḥ
Vocative	pratyupeya	pratyupeyau	pratyupeyāḥ
Accusative	pratyupeyam	pratyupeyau	pratyupeyān
Instrumental	pratyupeyena	pratyupeyābhyām	pratyupeyaiḥ pratyupeyebhiḥ
Dative	pratyupeyāya	pratyupeyābhyām	pratyupeyebhyaḥ
Ablative	pratyupeyāt	pratyupeyābhyām	pratyupeyebhyaḥ
Genitive	pratyupeyasya	pratyupeyayoḥ	pratyupeyānām
Locative	pratyupeye	pratyupeyayoḥ	pratyupeyeṣu

Compound pratyupeya -

Adverb -pratyupeyam -pratyupeyāt