/'daʊnfɔ:l; `daun,fɔl/ n [sing]
1 fall from a position of prosperity or power 衰落; 败落; 垮台
*Greed led to his downfall. 他贪得无厌而导致身败名裂.
2 thing that causes this 衰落、败落、垮台等的原因
*His vanity was his downfall. 他因虚荣心太重而垮台.
complete loss of your money, moral standards, social position etc, or the sudden failure of an organization
the scandal that led to the president's downfall
something that causes a complete failure or loss of someone's money, moral standards, social position etc
be sb's downfall
an addiction to gambling that proved to be her downfall
1. The licentious monarch helped bring about his country´s downfall. 这昏君荒淫无道, 加速了这个国家的灭亡。
2. His downfall was caused by gambling and drink. 他的垮台是由赌博和酗酒造成的。
3. A long-lost brother, who was presumed dead, was really alive all the time and wickedly plotting to bring about the hero´s downfall. And so on. 主人公一位长期失散的兄弟，大家都以为死了，实际上一直活着，并且正在策划暗算主人公；如此等等，
4. Gambling was his downfall. 赌博是他堕落的缘由。