demonically       
adverb uk/dɪˈmɒn.ɪ.kəl.i/ us/dɪˈmɑː.nɪ.kəl.i/
 凶恶地,恶魔般地
in a wild and evil way, like a devil (= evil spirit)
  Young glared demonically at the audience.  年轻人恶狠狠地瞪着观众。 
 She was imprisoned by her family, but was demonically possessed by a desire to escape. 她被家人囚禁起来,但却魔鬼附身般地被逃跑的欲望所控制。 
 See: demonic
 - More examples
 - His eyes flashed demonically at her.
 - He peeked out demonically from under his platinum blond hair.
 - She laughed demonically.