핵심key; core; center 폐결핵tuberculosis; consumption 핵key; core; center; heart 핵가족nuclear family 핵가족화nuclearization 핵무기nuclear weapon 핵심어key word 핵심적being central; being key; core 핵심적central; key; main 핵연료nuclear fuel

개인전individual sport 단체전team sport; team competition 도전challenge 도전자challenger 도전장challenge 도전적being defiant 도전적defiant; challenging 작전maneuver; tactics; strategy 전쟁war 준결승전semifinal

경쟁competition 경쟁력competitiveness 논쟁debate; argument 전쟁war 투쟁fight 항쟁protest; struggle; resistance 경쟁국rival country 경쟁률competition rate 경쟁사competitor; a rival company 경쟁심competitive spirit; sense of rivalry