kudos (n.)youdaoicibaDictYouDict[kudos 词源字典]
"fame, renown," 1799, probably originally in university slang, from Greek kydos "glory, fame," especially in battle, literally "that which is heard of," from PIE root *skeue- "to pay attention, perceive" (see caveat). A singular noun in Greek, but the final -s often is mistaken as a plural suffix in English, leading to the barbarous back-formation kudo (attested by 1936).[kudos etymology, kudos origin, 英语词源]