Akademik

intervene
in·ter·vene /ˌin-tər-'vēn/ vi -ven·ed, -ven·ing
1: to occur, fall, or come between points of time or events
may be held liable even though other independent agencies intervene between his negligence and the ultimate resultHooks Superx Inc. v. McLaughlin, 642 N.E.2d 514 (1994)
2 a: to come in or between by way of hindrance or modification
intervene to stop a fight
b: to become a party to a legal proceeding begun by others in order to protect an alleged interest in the subject matter of the proceeding
the Commissioner of Internal Revenue was granted leave to intervene — P. A. Freund compare implead, interplead, join
in·ter·ve·nor /-'vē-nər, -ˌnȯr/ n

Merriam-Webster’s Dictionary of Law. . 1996.