Declension table of ?nigantavya

Neuter	Singular	Dual	Plural
Nominative	nigantavyam	nigantavye	nigantavyāni
Vocative	nigantavya	nigantavye	nigantavyāni
Accusative	nigantavyam	nigantavye	nigantavyāni
Instrumental	nigantavyena	nigantavyābhyām	nigantavyaiḥ
Dative	nigantavyāya	nigantavyābhyām	nigantavyebhyaḥ
Ablative	nigantavyāt	nigantavyābhyām	nigantavyebhyaḥ
Genitive	nigantavyasya	nigantavyayoḥ	nigantavyānām
Locative	nigantavye	nigantavyayoḥ	nigantavyeṣu

Compound nigantavya -

Adverb -nigantavyam -nigantavyāt