급감rapid decrease; sharp fall; nosedive 급증rapid increase 급행열차express train 긴급emergency 긴급회의emergency meeting 응급실ER; emergency room 초특급being very speedy 특급special express 화급urgency; emergency 구급relief; rescue

사망death; passing away; being killed 사망률death rate 사망자the dead; casualty; victim 치사causing death 치사량lethal dose 치사율fatality rate; lethality rate 토사구팽killing the dog after hunting 필사desperation; franticness 필사적being desperate; being frantic 필사적desperate; frantic