최선the best 개선improvement 최선책the best plan 친선friendship; amity 개과천선reforming one’s character; mending one´s ways 개선안improvement plan 개선책corrective measure 권선징악encouraging good and punishing evil 다다익선the more, the better 독선self-righteousness

중심center 인심human nature; heart 민심public sentiment 결심decision; resolution; determination 관심interest; attention 점심lunch 점심시간lunchtime 조심caution; carefulness 중심center 핵심key; core; center