掛(か)け合(あ)うto negotiate (with someone about), to talk over (something with), to tackle someone (about), to haggle, to bargain

Définition du dictionnaire

Verbe godan en 'u', Verbe intransitif
1. 1.
  EN to negotiate (with someone about), to talk over (something with), to tackle someone (about), to haggle, to bargain
Verbe godan en 'u', Verbe transitif
1. 2.
  EN to throw on each other, to splash (water) on each other, to pour on each other