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

악담curse; malediction; criticism 악몽nightmare; bad dream 악취odor; stink 악화aggravation; worsening 최악the worst 추악being dirty; being evil 패악wickedness; viciousness 포악cruelty; viciousness 필요악necessary evil 해악evils; ills; mischief; harm