Declension table of ?arkapattra

Neuter	Singular	Dual	Plural
Nominative	arkapattram	arkapattre	arkapattrāṇi
Vocative	arkapattra	arkapattre	arkapattrāṇi
Accusative	arkapattram	arkapattre	arkapattrāṇi
Instrumental	arkapattreṇa	arkapattrābhyām	arkapattraiḥ
Dative	arkapattrāya	arkapattrābhyām	arkapattrebhyaḥ
Ablative	arkapattrāt	arkapattrābhyām	arkapattrebhyaḥ
Genitive	arkapattrasya	arkapattrayoḥ	arkapattrāṇām
Locative	arkapattre	arkapattrayoḥ	arkapattreṣu

Compound arkapattra -

Adverb -arkapattram -arkapattrāt