-유

Of Native Korean origin, related to standard Korean and more common 요 (-yo).

유 • (-yu)

1. Chungcheong form of 요 (-yo, “A particle attached to intimate-style verbs and adjectives to form the polite style”).
   • 2012 February 28, 최계자 [choegyeja], “고려장이 없어진 유래 [goryeojang'i eopseojin yurae]”, in 한국구비문학대계 [han'gukgubimunhakdaegye]‎, 충청남도 홍성군 결성면 [chungcheongnamdo hongseonggun gyeolseongmyeon]:

     고린장, 그전엔 고린장했잖유.

     Gorinjang, geujeonen gorinjanghaetjanyu.

     Back then didn't they practice Goryeo-jang.

As one of the more famous features of the dialect, it is frequently used in order to stereotypically replicate the Chungcheong dialect. Its use in the modern day, however, is largely restricted to elderly speakers, especially those residing in rural areas.