Declension table of ?nirasana

Neuter	Singular	Dual	Plural
Nominative	nirasanam	nirasane	nirasanāni
Vocative	nirasana	nirasane	nirasanāni
Accusative	nirasanam	nirasane	nirasanāni
Instrumental	nirasanena	nirasanābhyām	nirasanaiḥ
Dative	nirasanāya	nirasanābhyām	nirasanebhyaḥ
Ablative	nirasanāt	nirasanābhyām	nirasanebhyaḥ
Genitive	nirasanasya	nirasanayoḥ	nirasanānām
Locative	nirasane	nirasanayoḥ	nirasaneṣu

Compound nirasana -

Adverb -nirasanam -nirasanāt