Intervene
来自Big Physics
late 16th century (in the sense ‘come in as an extraneous factor or thing’): from Latin intervenire, from inter- ‘between’ + venire ‘come’.
wiktionary
Back-formation from intervention, and/or from Latin interveniō(“come between”, verb).
etymonline
intervene (v.)
1580s, "intercept" (obsolete), a back-formation from intervention, or else from Latin intervenire "to come between, intervene; interrupt; stand in the way, oppose, hinder," from inter "between" (see inter-) + venire "to come," from a suffixed form of PIE root *gwa- "to go, come." Sense of "come between, fall or happen between" (of events) is from c. 1600; that of "interfere, interpose oneself between, act mediatorially" is from 1640s. Related: Intervened; intervener; intervening.
