Line, wire
선 = line
유선 = wire, cable
무선 = Wireless
직선 = straight line
곡선 = curve
안전선 = safety line (subway)
1호선 = line no.1 (subway)
First, ahead
선생(님) = teacher
선불 = advanced payment (후불 = post payment)
선배 = one’s senior (school, company, etc.)
선임 = one’s senior (army, company, etc.)
선착순 = first-come-first-served basis
Selection
선거(하다) = election, vote
선택(하다) = selection, choice
선수 = player, athlete
Sutdy-Korean 