Harass or harassment is a when a person annoys or upsets someone else, usually repetitively. It's done on purpose and makes the target feel scared, worried or sick from fear. Usually the scared person can't tell the people to stop because they might lose their job, see their friends or family hurt, or have even more harassment start. Electronic harassment is the alleged use of electromagnetic waves to harass a victim.
Harassment Facts for Kids. Kiddle Encyclopedia.