유착이 · 유착을
collusion, cozy ties; (medical) adhesion
Example
정치권과 기업의 유착이 큰 문제가 되고 있습니다.
Collusion between politicians and businesses is becoming a big problem.
Word parts
유 heal+착 stick
Originally medical: tissues healing stuck together, hence ties that are too close.
Good to know
정경 유착 is the fixed news term for collusion between government and big business.