시작start; beginning 개시beginning; start; opening 개시일D-day; opening day 시구first pitch of a baseball game 시동start; initiate 시말서written apology and explanation 시무식meeting to launch the New Year 시발departure 시발점departure point 시점starting point

초beginning 초등학교elementary school; primary school 초등학생elementary school student; primary school student 초급elementary level; beginning stage 초급반beginner's class 초기beginning; start 초등elementary class 초반early stage; initial phase 초보first step; beginner level 초보자beginner; novice