invade

Verb

• penetrate or assault, in a harmful or injurious way
  • The cancer had invaded her lungs
    

• occupy in large numbers or live on a host
  • the Kudzu plant infests much of the South and is spreading to the North
    

• to intrude upon, infringe, encroach on, violate
  • This new colleague invades my territory
    
  • The neighbors intrude on your privacy
    

• march aggressively into another's territory by military force for the purposes of conquest and occupation
  • Hitler invaded Poland on September 1, 1939
    

Related words

• Synonyms: 
  overrun , infest , intrude on , obtrude upon , encroach upon , occupy