Declension table of ?cayitavya

Neuter	Singular	Dual	Plural
Nominative	cayitavyam	cayitavye	cayitavyāni
Vocative	cayitavya	cayitavye	cayitavyāni
Accusative	cayitavyam	cayitavye	cayitavyāni
Instrumental	cayitavyena	cayitavyābhyām	cayitavyaiḥ
Dative	cayitavyāya	cayitavyābhyām	cayitavyebhyaḥ
Ablative	cayitavyāt	cayitavyābhyām	cayitavyebhyaḥ
Genitive	cayitavyasya	cayitavyayoḥ	cayitavyānām
Locative	cayitavye	cayitavyayoḥ	cayitavyeṣu

Compound cayitavya -

Adverb -cayitavyam -cayitavyāt