side with
US /saɪd wɪð/
UK /saɪd wɪð/

1.
ponerse del lado de, apoyar
to support one person or group in an argument against another
:
•
I always side with my sister when she argues with our brother.
Siempre me pongo del lado de mi hermana cuando discute con nuestro hermano.
•
The manager decided to side with the employee, not the customer.
El gerente decidió ponerse del lado del empleado, no del cliente.