Declension table of ?vyayitavya

Neuter	Singular	Dual	Plural
Nominative	vyayitavyam	vyayitavye	vyayitavyāni
Vocative	vyayitavya	vyayitavye	vyayitavyāni
Accusative	vyayitavyam	vyayitavye	vyayitavyāni
Instrumental	vyayitavyena	vyayitavyābhyām	vyayitavyaiḥ
Dative	vyayitavyāya	vyayitavyābhyām	vyayitavyebhyaḥ
Ablative	vyayitavyāt	vyayitavyābhyām	vyayitavyebhyaḥ
Genitive	vyayitavyasya	vyayitavyayoḥ	vyayitavyānām
Locative	vyayitavye	vyayitavyayoḥ	vyayitavyeṣu

Compound vyayitavya -

Adverb -vyayitavyam -vyayitavyāt