전공major; specialty 비전문가nonprofessional; amateur 전공과목major course 전문가expert; specialist 전문점specialty store 전문직profession 전용being private 부전공minor 비전문적unprofessional 전공의resident

담임homeroom teacher; being in charge of class 임무mission; duty; assignment 책임duty; responsibility; obligation 책임감sense of responsibility 책임자person in charge 초임first post; first duty 취임inauguration; taking office 취임사inaugural address; inauguration speech 취임식inauguration; inaugural ceremony 퇴임retirement