exert

ex- [ex-]
ex- [前缀，表“前任的，从前的”]
serere [to join] *  see  ser- 2

•  verb [T]

1    exert authority/influence/pressure etc to use your authority or influence in order to make something happen:
?exert on: The UN is exerting pressure on the two countries to stop the war.
2    exert yourself to make a strong physical or mental effort