bilk in WordNet English dictionary

1. hinder or prevent (the efforts, plans, or desires) of
   "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
   thwart  queer  spoil  scotch  foil  cross  frustrate  baffle  bilk 
   
2. escape, either physically or mentally
   "The thief eluded the police"; "This difficult idea seems to evade her"; "The event evades explanation"
   elude  evade  bilk 
   
3. evade payment to
   "He bilked his creditors"
   bilk 
   
4. cheat somebody out of what is due, especially money
   bilk