verb
harass
huh-RASS/həˈræs/
To repeatedly bother or mistreat someone.
The man harasses the woman by repeatedly following and poking her shoulder.

Etymology
French harasser meant to tire out or vex. English developed the sense of vexing through repeated attacks, connecting persistent pressure with distress; the French verb’s deeper origin is uncertain.
In context
going to a classroom to wait till a particular student is leaving the classroom to threaten and and harass them because they may not be willing to join the gang
More examples
- She quit because her supervisor kept harassing her.
- The neighbors harassed us with threatening phone calls.
- He harasses his coworkers with cruel jokes about their appearance.
Forms
harass · harasses · harassed · harassing
harassment noun — Repeated behavior that bothers or mistreats someone.
harasser noun — Someone who repeatedly bothers or mistreats another.