Declension table of ?arcāvat

Masculine	Singular	Dual	Plural
Nominative	arcāvān	arcāvantau	arcāvantaḥ
Vocative	arcāvan	arcāvantau	arcāvantaḥ
Accusative	arcāvantam	arcāvantau	arcāvataḥ
Instrumental	arcāvatā	arcāvadbhyām	arcāvadbhiḥ
Dative	arcāvate	arcāvadbhyām	arcāvadbhyaḥ
Ablative	arcāvataḥ	arcāvadbhyām	arcāvadbhyaḥ
Genitive	arcāvataḥ	arcāvatoḥ	arcāvatām
Locative	arcāvati	arcāvatoḥ	arcāvatsu

Compound arcāvat -

Adverb -arcāvantam