Declension table of pātavya

Neuter	Singular	Dual	Plural
Nominative	pātavyam	pātavye	pātavyāni
Vocative	pātavya	pātavye	pātavyāni
Accusative	pātavyam	pātavye	pātavyāni
Instrumental	pātavyena	pātavyābhyām	pātavyaiḥ
Dative	pātavyāya	pātavyābhyām	pātavyebhyaḥ
Ablative	pātavyāt	pātavyābhyām	pātavyebhyaḥ
Genitive	pātavyasya	pātavyayoḥ	pātavyānām
Locative	pātavye	pātavyayoḥ	pātavyeṣu

Compound pātavya -

Adverb -pātavyam -pātavyāt