av·id
 /ˈævəd/  adj   [more ~; most ~]
  1 : very eager : enthusiastic, keen
   He is an avid admirer of horror movies.
   They took an avid interest in politics.
   an avid cook/dancer/fan/golfer/reader
   some of the newspaper's most avid readers
  2 : wanting something very much
   He was avid for success. = He was avid to succeed.
  avid·i·ty /əˈvıdəti/  noun  ,  pl   -i·ties [  noncount  ]
   They pursued fame/wealth with avidity.
  [  singular  ]
   an avidity for fame/wealth
  av·id·ly  adv  
   They are avidly interested in politics.