verb

subject to aggressive pressure or intimidation.

being harassed at work can leave you feeling confused and helpless

pester,badger,hound,harry,plague,torment,bedevil,persecute,bother,annoy,exasperate,worry,disturb,trouble,agitate,provoke,vex,stress,stress out,nag,keep on at,chivvy,tease,bait,molest,hassle,bug,give someone a hard time,drive someone up the wall,drive someone round the bend,drive someone round the twist,mither,devil,ride