Verb
1. 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?"2. be placed or located between other things or extend between spaces and events;
"This interludes intervenes between the two movements""Eight days intervened"3. occur between other event or between certain points of time;
"the war intervened between the birth of her two children"