criminal underworld
definitions
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The organized community of criminals, gangs, and syndicates that operate illegal activities outside the law and often in secret.ko: 범죄 세계
examples
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The police are working hard to infiltrate the criminal underworld and dismantle the drug smuggling ring.
경찰은 범죄 세계에 침투하여 마약 밀매 조직을 해체하기 위해 노력하고 있다.