Declension table of ?nigantavya

Masculine	Singular	Dual	Plural
Nominative	nigantavyaḥ	nigantavyau	nigantavyāḥ
Vocative	nigantavya	nigantavyau	nigantavyāḥ
Accusative	nigantavyam	nigantavyau	nigantavyān
Instrumental	nigantavyena	nigantavyābhyām	nigantavyaiḥ nigantavyebhiḥ
Dative	nigantavyāya	nigantavyābhyām	nigantavyebhyaḥ
Ablative	nigantavyāt	nigantavyābhyām	nigantavyebhyaḥ
Genitive	nigantavyasya	nigantavyayoḥ	nigantavyānām
Locative	nigantavye	nigantavyayoḥ	nigantavyeṣu

Compound nigantavya -

Adverb -nigantavyam -nigantavyāt