기원origin; beginning 단원chapter; unit 차원level 환원return; giving back; restoration 환원주의reductionism 고차원high level; high dimension 고차원적being high-level; being high-dimensional 고차원적high-level; high-dimensional 기원전B.C. 기원후A.D.

수도capital 수도권capital area; metropolitan area 수상prime minister 학수고대looking forward to; waiting eagerly for 괴수ringleader 교수대gallows; scaffold 교수형hanging 국가수반chief of state; head of state 기수nose cone 수su