故こ吾ごMeanings1nounone's former selfarchaicArchaic literary term for one's past self, often used in contrast with 今吾 (one's present self). Rare in modern Japanese.See also: 今吾古こ典てんでは「故こ吾ご」と「今こん吾ご」を対たい比ひして、人ひとの変へん化かを論ろんじることがある。In classical texts, 故吾 and 今吾 are sometimes contrasted to discuss personal change.