Declension table of ?prathya

Neuter	Singular	Dual	Plural
Nominative	prathyam	prathye	prathyāni
Vocative	prathya	prathye	prathyāni
Accusative	prathyam	prathye	prathyāni
Instrumental	prathyena	prathyābhyām	prathyaiḥ
Dative	prathyāya	prathyābhyām	prathyebhyaḥ
Ablative	prathyāt	prathyābhyām	prathyebhyaḥ
Genitive	prathyasya	prathyayoḥ	prathyānām
Locative	prathye	prathyayoḥ	prathyeṣu

Compound prathya -

Adverb -prathyam -prathyāt