추진propulsion; pushing; driving 후진국underdeveloped country; less developed country 선진being advanced 선진국advanced country; developed country 직진straight movement 진로course 진출expansion 진학entrance to a higher education institution 진행progress 진행자host; emcee

출퇴근commuting 퇴근leaving work; arriving home from work 퇴원leaving the hospital; being discharged from the hospital 퇴사leaving work; going home from work 퇴직resignation; retirement 탈퇴withdrawal; dropping out; leaving 퇴각withdrawal; retreat 퇴거leaving; resignation 퇴로retreat route; withdrawal route 퇴물hand-me-down

유지keeping; maintaining 광섬유optical fiber 생계유지making a living 섬유fiber 섬유소fibrin; cellulose 섬유질fiber; roughage 유신reformation; the Revitalizing Reform 유지비maintenance expense

계곡valley 협곡canyon; gorge 유곡deep valley 이율곡Yi Yulgok