선배senior; veteran 우선priority; preference 대선배senior; veteran 선생teacher; instructor 선약prior appointment 선진being advanced 선진국advanced country; developed country 여선생female teacher 우선first of all; to begin with; before everything 우선적priority

도입introduction 유도inducement; guidance; induction 지도guidance; instruction 지도자leader; head 계도guidance; enlightenment 교도correctional discipline; rehabilitation 교도관prison guard; prison officer; correctional officer; corrections officer 교도소prison; jail 도입부introduction 도체conductor