Declension table of ?prātavya

Neuter	Singular	Dual	Plural
Nominative	prātavyam	prātavye	prātavyāni
Vocative	prātavya	prātavye	prātavyāni
Accusative	prātavyam	prātavye	prātavyāni
Instrumental	prātavyena	prātavyābhyām	prātavyaiḥ
Dative	prātavyāya	prātavyābhyām	prātavyebhyaḥ
Ablative	prātavyāt	prātavyābhyām	prātavyebhyaḥ
Genitive	prātavyasya	prātavyayoḥ	prātavyānām
Locative	prātavye	prātavyayoḥ	prātavyeṣu

Compound prātavya -

Adverb -prātavyam -prātavyāt