simple past tense and past participle of intervene

(intransitive) To become involved in a situation, so as to alter or prevent an action. / (intransitive) To occur, fall, or come between, points of time, or events.

present participle of intervene

That intervenes or mediates. / Falling between two periods or events.

intervention; mediation

Third-person singular simple present indicative form of intervene

In a manner that enables intervention.

The quality of being intervenable.

Able to be intervened in; vulnerable to intervention.

plural of intervener