Declension table of ?purvayitavya

Neuter	Singular	Dual	Plural
Nominative	purvayitavyam	purvayitavye	purvayitavyāni
Vocative	purvayitavya	purvayitavye	purvayitavyāni
Accusative	purvayitavyam	purvayitavye	purvayitavyāni
Instrumental	purvayitavyena	purvayitavyābhyām	purvayitavyaiḥ
Dative	purvayitavyāya	purvayitavyābhyām	purvayitavyebhyaḥ
Ablative	purvayitavyāt	purvayitavyābhyām	purvayitavyebhyaḥ
Genitive	purvayitavyasya	purvayitavyayoḥ	purvayitavyānām
Locative	purvayitavye	purvayitavyayoḥ	purvayitavyeṣu

Compound purvayitavya -

Adverb -purvayitavyam -purvayitavyāt