Declension table of ?duravastha

Neuter	Singular	Dual	Plural
Nominative	duravastham	duravasthe	duravasthāni
Vocative	duravastha	duravasthe	duravasthāni
Accusative	duravastham	duravasthe	duravasthāni
Instrumental	duravasthena	duravasthābhyām	duravasthaiḥ
Dative	duravasthāya	duravasthābhyām	duravasthebhyaḥ
Ablative	duravasthāt	duravasthābhyām	duravasthebhyaḥ
Genitive	duravasthasya	duravasthayoḥ	duravasthānām
Locative	duravasthe	duravasthayoḥ	duravastheṣu

Compound duravastha -

Adverb -duravastham -duravasthāt