negotiate, parley
Il demande qu'un de nos vaisseaux vienne parlementer.
He’s asking for one of our ships to come negotiate.
— Star Trek V : L'Ultime Frontière (1989)
Je t'avais dit qu'ils allaient venir parlementer.
I told you they were going to come and talk things over.
— Once Upon a Time... in Hollywood (2019)