Meanings1silly; stupid; idioticOne's thought or behavior being not smart or wise.Examples from Lessons (3)네가 그 힘을 가지려고 하다니 정말 어리석은 생각이야.It is truly a foolish thought for you to try and possess that power.Read the Lesson 너의 그 이기적인 행동들이 정말 어리석어 빠졌다고 말하고 싶은 거야.I am saying that your selfish actions are truly foolish.Read the Lesson 내가 정말 어리석었고 경솔했어.I was so foolish and reckless.Read the Lesson Grammar in These Examples-아/어Level 1Informal ending-ㄴ/은Level 1Adjective noun modifier-고Level 1And, and then-는다고/ㄴ다고/다고Level 3Say that, claim that