Declension table of ?pāyitavya

Neuter	Singular	Dual	Plural
Nominative	pāyitavyam	pāyitavye	pāyitavyāni
Vocative	pāyitavya	pāyitavye	pāyitavyāni
Accusative	pāyitavyam	pāyitavye	pāyitavyāni
Instrumental	pāyitavyena	pāyitavyābhyām	pāyitavyaiḥ
Dative	pāyitavyāya	pāyitavyābhyām	pāyitavyebhyaḥ
Ablative	pāyitavyāt	pāyitavyābhyām	pāyitavyebhyaḥ
Genitive	pāyitavyasya	pāyitavyayoḥ	pāyitavyānām
Locative	pāyitavye	pāyitavyayoḥ	pāyitavyeṣu

Compound pāyitavya -

Adverb -pāyitavyam -pāyitavyāt