Declension table of ?nivīrya

Neuter	Singular	Dual	Plural
Nominative	nivīryam	nivīrye	nivīryāṇi
Vocative	nivīrya	nivīrye	nivīryāṇi
Accusative	nivīryam	nivīrye	nivīryāṇi
Instrumental	nivīryeṇa	nivīryābhyām	nivīryaiḥ
Dative	nivīryāya	nivīryābhyām	nivīryebhyaḥ
Ablative	nivīryāt	nivīryābhyām	nivīryebhyaḥ
Genitive	nivīryasya	nivīryayoḥ	nivīryāṇām
Locative	nivīrye	nivīryayoḥ	nivīryeṣu

Compound nivīrya -

Adverb -nivīryam -nivīryāt