Same word as disturb:

afflict,agitate, ail,alarm,amaze,annoy,arouse,astound,badger, burn up,complicate,confound,confuse,depress, discompose,dishearten,disrupt,distract,distress,excite,fluster,frighten,gall,grieve,harass,interfere,interrupt,intrude,irk,irritate, make uneasy, mo