Declension table of ?nirasana

Masculine	Singular	Dual	Plural
Nominative	nirasanaḥ	nirasanau	nirasanāḥ
Vocative	nirasana	nirasanau	nirasanāḥ
Accusative	nirasanam	nirasanau	nirasanān
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