Declension table of ?ādayitavya

Neuter	Singular	Dual	Plural
Nominative	ādayitavyam	ādayitavye	ādayitavyāni
Vocative	ādayitavya	ādayitavye	ādayitavyāni
Accusative	ādayitavyam	ādayitavye	ādayitavyāni
Instrumental	ādayitavyena	ādayitavyābhyām	ādayitavyaiḥ
Dative	ādayitavyāya	ādayitavyābhyām	ādayitavyebhyaḥ
Ablative	ādayitavyāt	ādayitavyābhyām	ādayitavyebhyaḥ
Genitive	ādayitavyasya	ādayitavyayoḥ	ādayitavyānām
Locative	ādayitavye	ādayitavyayoḥ	ādayitavyeṣu

Compound ādayitavya -

Adverb -ādayitavyam -ādayitavyāt