balefully       
adverb uk/ˈbeɪl.fəl.i/ us/ˈbeɪl.fəl.i/
 邪恶地;恶毒地;凶暴地
in a way that shows a threat to do something bad or hurt someone
  She glared balefully at me. 她恶狠狠地瞪了我一眼。 
 He shook his head and stared balefully out across the room. 他摇摇头,恶狠狠地盯着房间的另一边。 
 See: baleful
 - More examples
- She rolled her eyes balefully.
- The two men watched him balefully, whispering together.
- In the past, he balefully accused nearly everyone of betrayal.