early 15c., intervencioun, "intercession, intercessory prayer," Late Latin interventionem (nominative interventio) "an interposing, a giving security," literally "a coming between," noun of action from past-participle stem of Latin intervenire "to come between, interrupt," from inter "between" (see inter-) + venire "to come" (from a suffixed form of PIE root *gwa- "to go, come"). Later "act of intervening" in any way; in 19c.-20c. often of international relations; by 1983 of interpersonal intrusions by friends or family meant to reform a life felt to be going wrong.
"intervention; interposition; intermediacy," c. 1600, noun of action from intermediate (v.).
used from c. 1946 in a variety of senses, both by those supporting and those opposed to whatever it was: American intervention in foreign conflicts, a global foreign policy; supremacy of global institutions over national ones; a worldwide extension of capitalist market systems; from global + -ism. Related: Globalist.
late 14c., mediacioun, "intervention, agency or action as a mediator or intermediary," from Medieval Latin mediationem (nominative mediatio) "a division in the middle," noun of action from past-participle stem of Latin mediare "to halve; to be in the middle," from medius "middle" (from PIE root *medhyo- "middle"). Related: Mediational.
1590s (implied in proximately), "closely neighboring; next, immediate, without intervention of a third," from Late Latin proximatus, past participle of proximare "to draw near, approach," from proximus "nearest, next; most direct; adjoining," figuratively "latest, most recent; next, following; most faithful," superlative of prope "near" (see propinquity). Meaning "coming next in a chain of causation" is by 1660s. Related: Proximately.