Declension table of ?pratyupeya

Neuter	Singular	Dual	Plural
Nominative	pratyupeyam	pratyupeye	pratyupeyāni
Vocative	pratyupeya	pratyupeye	pratyupeyāni
Accusative	pratyupeyam	pratyupeye	pratyupeyāni
Instrumental	pratyupeyena	pratyupeyābhyām	pratyupeyaiḥ
Dative	pratyupeyāya	pratyupeyābhyām	pratyupeyebhyaḥ
Ablative	pratyupeyāt	pratyupeyābhyām	pratyupeyebhyaḥ
Genitive	pratyupeyasya	pratyupeyayoḥ	pratyupeyānām
Locative	pratyupeye	pratyupeyayoḥ	pratyupeyeṣu

Compound pratyupeya -

Adverb -pratyupeyam -pratyupeyāt