If you are ardent, you are passionate about something
zagorzały fan
He is an ardent fan of Lech Poznan. On jest gorliwym fanem Lecha Poznań.
Robert is not what you would call one of Game of Throne most ardent fans.
Robert nie należy do najbardziej zagorzałych fanów Gry o Tron.
ardent supporter
ardent fan
ardent advocate
ardent admirer
ardent defender
ardent opponent
ardent lover
big fan
huge fan
avid fan