Declension table of ?nirvyasana

Neuter	Singular	Dual	Plural
Nominative	nirvyasanam	nirvyasane	nirvyasanāni
Vocative	nirvyasana	nirvyasane	nirvyasanāni
Accusative	nirvyasanam	nirvyasane	nirvyasanāni
Instrumental	nirvyasanena	nirvyasanābhyām	nirvyasanaiḥ
Dative	nirvyasanāya	nirvyasanābhyām	nirvyasanebhyaḥ
Ablative	nirvyasanāt	nirvyasanābhyām	nirvyasanebhyaḥ
Genitive	nirvyasanasya	nirvyasanayoḥ	nirvyasanānām
Locative	nirvyasane	nirvyasanayoḥ	nirvyasaneṣu

Compound nirvyasana -

Adverb -nirvyasanam -nirvyasanāt