Declension table of ?vyapayāna

Neuter	Singular	Dual	Plural
Nominative	vyapayānam	vyapayāne	vyapayānāni
Vocative	vyapayāna	vyapayāne	vyapayānāni
Accusative	vyapayānam	vyapayāne	vyapayānāni
Instrumental	vyapayānena	vyapayānābhyām	vyapayānaiḥ
Dative	vyapayānāya	vyapayānābhyām	vyapayānebhyaḥ
Ablative	vyapayānāt	vyapayānābhyām	vyapayānebhyaḥ
Genitive	vyapayānasya	vyapayānayoḥ	vyapayānānām
Locative	vyapayāne	vyapayānayoḥ	vyapayāneṣu

Compound vyapayāna -

Adverb -vyapayānam -vyapayānāt