Declension table of ?avasathya

Neuter	Singular	Dual	Plural
Nominative	avasathyam	avasathye	avasathyāni
Vocative	avasathya	avasathye	avasathyāni
Accusative	avasathyam	avasathye	avasathyāni
Instrumental	avasathyena	avasathyābhyām	avasathyaiḥ
Dative	avasathyāya	avasathyābhyām	avasathyebhyaḥ
Ablative	avasathyāt	avasathyābhyām	avasathyebhyaḥ
Genitive	avasathyasya	avasathyayoḥ	avasathyānām
Locative	avasathye	avasathyayoḥ	avasathyeṣu

Compound avasathya -

Adverb -avasathyam -avasathyāt