intervenire significa in inglese

intervene [intervened, intervening, intervenes]▼(to become involved in a situation, so as to alter or prevent an action)
verb
[UK: ˌɪn.tə.ˈviːn] [US: ˌɪn.tər.ˈviːn]John intervened. = John intervenne.

step in▼(To get involved)
verb
[UK: step ɪn] [US: ˈstep ɪn]

take action▼(to act, especially decisively)
verb
[UK: teɪk ˈæk.ʃn̩] [US: ˈteɪk ˈæk.ʃn̩]