hammer out
US /ˈhæm.ər aʊt/
UK /ˈhæm.ər aʊt/

1.
negociar, elaborar
to discuss and negotiate until an agreement is reached
:
•
They spent hours trying to hammer out a deal.
Eles passaram horas tentando negociar um acordo.
•
The committee needs to hammer out a new policy.
O comitê precisa elaborar uma nova política.