Declension table of ?avyathya

Neuter	Singular	Dual	Plural
Nominative	avyathyam	avyathye	avyathyāni
Vocative	avyathya	avyathye	avyathyāni
Accusative	avyathyam	avyathye	avyathyāni
Instrumental	avyathyena	avyathyābhyām	avyathyaiḥ
Dative	avyathyāya	avyathyābhyām	avyathyebhyaḥ
Ablative	avyathyāt	avyathyābhyām	avyathyebhyaḥ
Genitive	avyathyasya	avyathyayoḥ	avyathyānām
Locative	avyathye	avyathyayoḥ	avyathyeṣu

Compound avyathya -

Adverb -avyathyam -avyathyāt