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

1.
ponto de discórdia, impasse
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.
O principal ponto de discórdia nas negociações foi o orçamento.
•
We reached a sticking point on the terms of the contract.
Chegamos a um ponto de discórdia sobre os termos do contrato.