torment, rag, bedevil, crucify, dun, frustrate

treat cruelly; "The children tormented the stuttering teacher"

• madden — drive up the wall; go on someone's nerves
• hamstring — make ineffective or powerless
• tease, badger, harass, pester, bug, beleaguer — annoy persistently
• persecute, oppress, harass — cause to suffer

• harass, hassle, harry, chivy, chivvy, chevy, chevvy, beset, plague, molest, provoke — annoy continually or chronically