interpose

Verb

• 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?
    

• to insert between other elements
  • She interjected clever remarks
    

• introduce
  • God interposed death
    

• be or come between
  • An interposing thicket blocked their way
    

Related words

• Synonyms: 
  intervene , step in , interfere , interject , come in , put in , throw in , inject