besiege in WordNet English dictionary

1. surround so as to force to give up
   "The Turks besieged Vienna"
   besiege  beleaguer  surround  hem in  circumvent 
   
2. harass, as with questions or requests
   "The press photographers besieged the movie star"
   besiege 
   
3. cause to feel distressed or worried
   "She was besieged by so many problems that she got discouraged"
   besiege