thorny
US /ˈθɔːr.ni/
UK /ˈθɔːr.ni/

1.
2.
까다로운, 어려운, 복잡한
causing difficulties or disagreements; complex and difficult to deal with
:
•
The negotiations faced many thorny issues.
협상은 많은 까다로운 문제에 직면했다.
•
It was a thorny problem that required careful consideration.
그것은 신중한 고려가 필요한 까다로운 문제였다.