Declension table of ?deśayitavya

Neuter	Singular	Dual	Plural
Nominative	deśayitavyam	deśayitavye	deśayitavyāni
Vocative	deśayitavya	deśayitavye	deśayitavyāni
Accusative	deśayitavyam	deśayitavye	deśayitavyāni
Instrumental	deśayitavyena	deśayitavyābhyām	deśayitavyaiḥ
Dative	deśayitavyāya	deśayitavyābhyām	deśayitavyebhyaḥ
Ablative	deśayitavyāt	deśayitavyābhyām	deśayitavyebhyaḥ
Genitive	deśayitavyasya	deśayitavyayoḥ	deśayitavyānām
Locative	deśayitavye	deśayitavyayoḥ	deśayitavyeṣu

Compound deśayitavya -

Adverb -deśayitavyam -deśayitavyāt