intervene

(v) get involved, so as to alter or hinder an action, or through force or threat of force
- Why did the U.S. not intervene earlier in WW II?
step in, interfere, interpose,
(v) be placed or located between other things or extend between spaces and events
- This interludes intervenes between the two movements
- Eight days intervened
(v) occur between other event or between certain points of time
- the war intervened between the birth of her two children

step in interfere interpose