Declension table of ?dīrgharasana

Masculine	Singular	Dual	Plural
Nominative	dīrgharasanaḥ	dīrgharasanau	dīrgharasanāḥ
Vocative	dīrgharasana	dīrgharasanau	dīrgharasanāḥ
Accusative	dīrgharasanam	dīrgharasanau	dīrgharasanān
Instrumental	dīrgharasanena	dīrgharasanābhyām	dīrgharasanaiḥ dīrgharasanebhiḥ
Dative	dīrgharasanāya	dīrgharasanābhyām	dīrgharasanebhyaḥ
Ablative	dīrgharasanāt	dīrgharasanābhyām	dīrgharasanebhyaḥ
Genitive	dīrgharasanasya	dīrgharasanayoḥ	dīrgharasanānām
Locative	dīrgharasane	dīrgharasanayoḥ	dīrgharasaneṣu

Compound dīrgharasana -

Adverb -dīrgharasanam -dīrgharasanāt