Declension table of ?dvādaśika

Neuter	Singular	Dual	Plural
Nominative	dvādaśikam	dvādaśike	dvādaśikāni
Vocative	dvādaśika	dvādaśike	dvādaśikāni
Accusative	dvādaśikam	dvādaśike	dvādaśikāni
Instrumental	dvādaśikena	dvādaśikābhyām	dvādaśikaiḥ
Dative	dvādaśikāya	dvādaśikābhyām	dvādaśikebhyaḥ
Ablative	dvādaśikāt	dvādaśikābhyām	dvādaśikebhyaḥ
Genitive	dvādaśikasya	dvādaśikayoḥ	dvādaśikānām
Locative	dvādaśike	dvādaśikayoḥ	dvādaśikeṣu

Compound dvādaśika -

Adverb -dvādaśikam -dvādaśikāt