Definition of harasses:
(v) :
(specifically) To persistently bother (someone, or a group of people) physically or psychologically when such behaviour is illegal and/or unwanted, especially over an extended period.
(v) :
To annoy (someone) frequently or systematically; to pester.
(v) :
To put excessive burdens upon (someone); to subject (someone) to anxieties.
(v) :
To trouble (someone, or a group of people) through repeated military-style attacks.
(n) :
(archaic) Harassment; pestering.
(v) :
(obsolete) Often followed by out: to fatigue or tire (someone) with exhausting and repeated efforts.