bedevil

Verb

• be confusing or perplexing to; cause to be unable to think clearly
  • These questions confuse even the experts
    
  • This question completely threw me
    
  • This question befuddled even the teacher
    

• treat cruelly
  • The children tormented the stuttering teacher
    

Related words

• Synonyms: 
  confuse , throw , fox , befuddle , fuddle , confound , discombobulate , torment , rag , crucify , dun , frustrate