Declension table of ?cahayitavya

Neuter	Singular	Dual	Plural
Nominative	cahayitavyam	cahayitavye	cahayitavyāni
Vocative	cahayitavya	cahayitavye	cahayitavyāni
Accusative	cahayitavyam	cahayitavye	cahayitavyāni
Instrumental	cahayitavyena	cahayitavyābhyām	cahayitavyaiḥ
Dative	cahayitavyāya	cahayitavyābhyām	cahayitavyebhyaḥ
Ablative	cahayitavyāt	cahayitavyābhyām	cahayitavyebhyaḥ
Genitive	cahayitavyasya	cahayitavyayoḥ	cahayitavyānām
Locative	cahayitavye	cahayitavyayoḥ	cahayitavyeṣu

Compound cahayitavya -

Adverb -cahayitavyam -cahayitavyāt