강의lecture 강의록lecture notes 강의실classroom; lecture room 민주주의democracy 의무duty; responsibility; obligation 의무적being mandatory; being obligatory; being compulsory 의무적mandatory; obligatory; compulsory 정의definition 채식주의vegetarianism 초현실주의surrealism

치과dental surgery; dentistry; dentist’s office; dental clinic 치약toothpaste 충치tooth cavity; decayed tooth; carious tooth 치teeth 치석tartar; scale; plaque 치아tooth 치열tooth arrangement; row of teeth 치통toothache 유치milk tooth 절치부심strong desire to take revenge