Declension table of arka

Neuter	Singular	Dual	Plural
Nominative	arkam	arke	arkāṇi
Vocative	arka	arke	arkāṇi
Accusative	arkam	arke	arkāṇi
Instrumental	arkeṇa	arkābhyām	arkaiḥ
Dative	arkāya	arkābhyām	arkebhyaḥ
Ablative	arkāt	arkābhyām	arkebhyaḥ
Genitive	arkasya	arkayoḥ	arkāṇām
Locative	arke	arkayoḥ	arkeṣu

Compound arka -

Adverb -arkam -arkāt