auxiliary
Archaic polite copula, equivalent to modern でございます. Used in historical or highly formal contexts, often associated with Edo-period speech.
See also: でございます
「これは何でげすか?」と、昔の商人が尋ねた。
"What is this?" asked the old-time merchant.
時代劇では、「そうでげす」という言い回しがよく聞かれる。
In period dramas, the phrase "そうでげす" is often heard.