sticking point
US /ˈstɪk.ɪŋ ˌpɔɪnt/
UK /ˈstɪk.ɪŋ ˌpɔɪnt/

1.
症結, 障礙
a point in a discussion or negotiation at which no further progress can be made because of a fundamental disagreement
:
•
The main sticking point in the negotiations was the budget.
談判的主要症結在於預算。
•
We reached a sticking point on the terms of the contract.
我們在合同條款上遇到了症結。