avail in WordNet English dictionary

1. a means of serving
   "of no avail"; "there's no help for it"
   avail  help  service 
   

1. use to one's advantage
   "He availed himself of the available resources"
   avail 
   
2. take or use
   "She helped herself to some of the office supplies"
   avail  help 
   
3. be of use to, be useful to
   "It will avail them to dispose of their booty"
   avail