interpose in WordNet English dictionary

1. to insert between other elements
   "She interjected clever remarks"
   interject  come in  interpose  put in  throw in  inject 
   
2. get involved, so as to alter or hinder an action, or through force or threat of force
   "Why did the U.S. not intervene earlier in WW II?"
   intervene  step in  interfere  interpose 
   
3. introduce
   "God interposed death"
   interpose 
   
4. be or come between
   "An interposing thicket blocked their way"
   interpose