how do i say in arabic "to team up on / join forces together against" ???
for example "they teamed up on me, joined together against me" , the meaning maybe in speech for example in a debate or possibly like 2 countries joining together against another in war.

I have for ينضم الى but I don't know if its correct ??

I look forward to any suggestions.

Question

how do i say in arabic "to team up on / join forces together against" ???
for example "they teamed up on me, joined together against me" , the meaning maybe in speech for example in a debate or possibly like 2 countries joining together against another in war.

I have for ينضم الى  but I don't know if its correct ??

I look forward to any suggestions.

Answer

Hmmm there are some expressions each of which depends on the context, yes the most common one is اجتمعوا
we also have تحالفوا
if they were indivisuals we can use احاطوا
one cannot refer merely to the fact that they gathered.. we often justify it , why they do so. if there were wicked intentions we use تآمروا 
or if that person was himslef the wicked one, we use تعانوا
also they انضموا for one another to في التصدي
if facing.
والله اعلم :)

Answer

They joined together against me : 
اجتمعوا ضدي
or
 اجتمعوا معاً ضدي