Declension table of ?dhūrtatva

Neuter	Singular	Dual	Plural
Nominative	dhūrtatvam	dhūrtatve	dhūrtatvāni
Vocative	dhūrtatva	dhūrtatve	dhūrtatvāni
Accusative	dhūrtatvam	dhūrtatve	dhūrtatvāni
Instrumental	dhūrtatvena	dhūrtatvābhyām	dhūrtatvaiḥ
Dative	dhūrtatvāya	dhūrtatvābhyām	dhūrtatvebhyaḥ
Ablative	dhūrtatvāt	dhūrtatvābhyām	dhūrtatvebhyaḥ
Genitive	dhūrtatvasya	dhūrtatvayoḥ	dhūrtatvānām
Locative	dhūrtatve	dhūrtatvayoḥ	dhūrtatveṣu

Compound dhūrtatva -

Adverb -dhūrtatvam -dhūrtatvāt