collude
/kəˈluːd/
to work together secretly or illegally in order to trick other people
collude (with somebody) (in something/in doing something)
Several people had colluded in the murder.
collude (with somebody) (to do something)
They colluded with terrorists to overthrow the government.
The president accused his opponents of colluding with foreigners.
Word Origin
early 16th cent.: from Latin colludere ‘have a secret agreement’, from col- ‘together’ + ludere ‘to play’.
e.g.