Declension table of ?dadarvas

Neuter	Singular	Dual	Plural
Nominative	dadarvat	dadaruṣī	dadarvāṃsi
Vocative	dadarvat	dadaruṣī	dadarvāṃsi
Accusative	dadarvat	dadaruṣī	dadarvāṃsi
Instrumental	dadaruṣā	dadarvadbhyām	dadarvadbhiḥ
Dative	dadaruṣe	dadarvadbhyām	dadarvadbhyaḥ
Ablative	dadaruṣaḥ	dadarvadbhyām	dadarvadbhyaḥ
Genitive	dadaruṣaḥ	dadaruṣoḥ	dadaruṣām
Locative	dadaruṣi	dadaruṣoḥ	dadarvatsu

Compound dadarvat -

Adverb -dadarvat