Declension table of ?nirbhugna

Neuter	Singular	Dual	Plural
Nominative	nirbhugnam	nirbhugne	nirbhugnāni
Vocative	nirbhugna	nirbhugne	nirbhugnāni
Accusative	nirbhugnam	nirbhugne	nirbhugnāni
Instrumental	nirbhugnena	nirbhugnābhyām	nirbhugnaiḥ
Dative	nirbhugnāya	nirbhugnābhyām	nirbhugnebhyaḥ
Ablative	nirbhugnāt	nirbhugnābhyām	nirbhugnebhyaḥ
Genitive	nirbhugnasya	nirbhugnayoḥ	nirbhugnānām
Locative	nirbhugne	nirbhugnayoḥ	nirbhugneṣu

Compound nirbhugna -

Adverb -nirbhugnam -nirbhugnāt