Declension table of arcis

Neuter	Singular	Dual	Plural
Nominative	arciḥ	arciṣī	arcīṃṣi
Vocative	arciḥ	arciṣī	arcīṃṣi
Accusative	arciḥ	arciṣī	arcīṃṣi
Instrumental	arciṣā	arcirbhyām	arcirbhiḥ
Dative	arciṣe	arcirbhyām	arcirbhyaḥ
Ablative	arciṣaḥ	arcirbhyām	arcirbhyaḥ
Genitive	arciṣaḥ	arciṣoḥ	arciṣām
Locative	arciṣi	arciṣoḥ	arciḥṣu

Compound arcis -

Adverb -arcis