Definitions:

1. to cheat somebody out of what is due, especially money verb
   • The crooks tried to bilk me but I outsmarted them.
2. to escape, either physically or mentally verb
   • I bilked my captures by reading books in my jail cell.
3. to evade payment to verb
   • They bilked their creditors.
4. to hinder or prevent the efforts, plans, or desires of verb
   • I bilked my friend by turning down their picnic plans.

Synonyms:

• evade
• spoil