soi-disant (adj.)youdaoicibaDictYouDict[soi-disant 词源字典]
"self-named, so-called, would-be," 1752 (in Chesterfield), French, from soi "oneself" (from Latin se, see se-) + present participle of dire "to say" (see diction).[soi-disant etymology, soi-disant origin, 英语词源]