English definition of “intervene”
/ˌɪntəˈviːn/ verb [I]
BECOME INVOLVED › to become involved in a situation in order to try to stop a fight, argument, problem, etc: Government officials refused to intervene in the recent disputes. [+ to do sth] Harris intervened to stop the attack.
INTERRUPT › to interrupt someone who is talking: "Mr Lawrence," the judge intervened, "please be silent."
PREVENT › If something intervenes, it stops something or prevents it from happening: She was going to marry Barratt but tragedy intervened.