bedevil

verbs

treat cruelly
"The children tormented the stuttering teacher"
bedevil, crucify, dun, frustrate, rag, torment
is derived from
bedevilment
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"
bedevil, befuddle, confound, confuse, discombobulate, fox, fuddle, throw