avail avail /əˈveɪl/

noun

1. () A means of serving  ( service , help , avail )
   a means of serving
    Of no avail
   of no avail
    There's no help for it
   there's no help for it
   

verb

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