relinquish in WordNet English dictionary

1. do without or cease to hold or adhere to
   "We are dispensing with formalities"; "relinquish the old ideas"
   waive  relinquish  forgo  forego  foreswear  dispense with 
   
2. turn away from; give up
   "I am foreswearing women forever"
   foreswear  renounce  quit  relinquish 
   
3. part with a possession or right
   "I am relinquishing my bedroom to the long-term house guest"; "resign a claim to the throne"
   release  relinquish  resign  free  give up 
   
4. release, as from one's grip
   "Let go of the door handle, please!"; "relinquish your grip on the rope--you won't fall"
   let go of  let go  release  relinquish