Declension table of ?pratyayitavya

Neuter	Singular	Dual	Plural
Nominative	pratyayitavyam	pratyayitavye	pratyayitavyāni
Vocative	pratyayitavya	pratyayitavye	pratyayitavyāni
Accusative	pratyayitavyam	pratyayitavye	pratyayitavyāni
Instrumental	pratyayitavyena	pratyayitavyābhyām	pratyayitavyaiḥ
Dative	pratyayitavyāya	pratyayitavyābhyām	pratyayitavyebhyaḥ
Ablative	pratyayitavyāt	pratyayitavyābhyām	pratyayitavyebhyaḥ
Genitive	pratyayitavyasya	pratyayitavyayoḥ	pratyayitavyānām
Locative	pratyayitavye	pratyayitavyayoḥ	pratyayitavyeṣu

Compound pratyayitavya -

Adverb -pratyayitavyam -pratyayitavyāt