She was 'fanatically' devoted to her job.
a religious 'fanatic' [='extremist']
He is 'fanatical about' boating.
(..) _ I'd call that a successful gambit. - Would you? - Look around. The city has come back to life. - You made a pact with fanatics. - I did and it worked. If you shaved your beard with a straight razor, you'd say the razor worked. That doesn't mean it won't cut your throat. (..)2016 TvShow: Game of Thrones Title: No One Season: 6 Episode 8