Declension table of ?niradhva

Neuter	Singular	Dual	Plural
Nominative	niradhvam	niradhve	niradhvāni
Vocative	niradhva	niradhve	niradhvāni
Accusative	niradhvam	niradhve	niradhvāni
Instrumental	niradhvena	niradhvābhyām	niradhvaiḥ
Dative	niradhvāya	niradhvābhyām	niradhvebhyaḥ
Ablative	niradhvāt	niradhvābhyām	niradhvebhyaḥ
Genitive	niradhvasya	niradhvayoḥ	niradhvānām
Locative	niradhve	niradhvayoḥ	niradhveṣu

Compound niradhva -

Adverb -niradhvam -niradhvāt