Declension table of ?vyayya

Neuter	Singular	Dual	Plural
Nominative	vyayyam	vyayye	vyayyāni
Vocative	vyayya	vyayye	vyayyāni
Accusative	vyayyam	vyayye	vyayyāni
Instrumental	vyayyena	vyayyābhyām	vyayyaiḥ
Dative	vyayyāya	vyayyābhyām	vyayyebhyaḥ
Ablative	vyayyāt	vyayyābhyām	vyayyebhyaḥ
Genitive	vyayyasya	vyayyayoḥ	vyayyānām
Locative	vyayye	vyayyayoḥ	vyayyeṣu

Compound vyayya -

Adverb -vyayyam -vyayyāt