Declension table of ?nighnāna

Neuter	Singular	Dual	Plural
Nominative	nighnānam	nighnāne	nighnānāni
Vocative	nighnāna	nighnāne	nighnānāni
Accusative	nighnānam	nighnāne	nighnānāni
Instrumental	nighnānena	nighnānābhyām	nighnānaiḥ
Dative	nighnānāya	nighnānābhyām	nighnānebhyaḥ
Ablative	nighnānāt	nighnānābhyām	nighnānebhyaḥ
Genitive	nighnānasya	nighnānayoḥ	nighnānānām
Locative	nighnāne	nighnānayoḥ	nighnāneṣu

Compound nighnāna -

Adverb -nighnānam -nighnānāt