intervene
1. [ verb ] get involved, so as to alter or hinder an action, or through force or threat of force
Synonyms: interfere step_in interpose
Examples:

"Why did the U.S. not intervene earlier in WW II?"

Related terms: interact meddle poke_into interlope intervention
2. [ verb ] be placed or located between other things or extend between spaces and events
Examples:

"This interludes intervenes between the two movements" "Eight days intervened"

Related terms: lie
3. [ verb ] occur between other event or between certain points of time
Examples:

"the war intervened between the birth of her two children"

Related terms: anticipate
Similar spelling:   intervention
  interwoven
  intervenor
  internet
  intervening
  interference
  intern
  internode
  interfere
  interview
  intertwine
  interferon
  interbreed
  interphone
  in_turn
  interne
  intertwined
  interviewer
  internecine
  interviewee
  interiorise
  interlinear
  interpreted
  interpreter
  interlineal
  interiorize
  intermingle
  intersperse
  interred
  interval
  interest
  intersex
  internee
  interior
  internal
  interconnect
  intermingled
  interspecies
  interactive
  interlace
  interleaf
  interlude
  interlope
  interject
  interment
  interlink
  internist
  interface
  internalise
  internalize
  interlard
  intercept
  interpose
  interpret
  intercede
  intersect
  interbred
  in_theory
  internal_ear
  interpretive
  interminable
  interested
  interlaced
  intermezzo
  interlayer
  interleave
  interweave
  interloper
  intermarry
  in_the_raw
  intermural
  internally
  internment
  interlaken
  internship
  interstice
  in-tray
  interstate
  interbrain
  intersexual
  interrelate
  interregnum
  interdepend
  interceptor
  intercessor
  interesting
  intermeshed
  interfering
  interim
  Interlingua
  interleukin
  internuncio
  in_the_air