Declension table of ?nottavya

Neuter	Singular	Dual	Plural
Nominative	nottavyam	nottavye	nottavyāni
Vocative	nottavya	nottavye	nottavyāni
Accusative	nottavyam	nottavye	nottavyāni
Instrumental	nottavyena	nottavyābhyām	nottavyaiḥ
Dative	nottavyāya	nottavyābhyām	nottavyebhyaḥ
Ablative	nottavyāt	nottavyābhyām	nottavyebhyaḥ
Genitive	nottavyasya	nottavyayoḥ	nottavyānām
Locative	nottavye	nottavyayoḥ	nottavyeṣu

Compound nottavya -

Adverb -nottavyam -nottavyāt