사four 사계절four seasons 사십forty 사월April 사방four directions 사촌cousin 고종사촌cousin by paternal aunt 문방사우The Four Friends of the Study 사각quadrangle; being quadrangular 사각형quadrangle; square

차례procedure; process 순차turn 연차the order of age; the order of number of years 일차being the first; being primary 절차procedure 점차being gradual 점차gradually 차cha 차례차례one at a time 차례차례one at a time

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.