To put excessive burdens upon (someone); to subject (someone) to anxieties.
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.
To annoy (someone) frequently or systematically; to pester.
To trouble (someone, or a group of people) through repeated military-style attacks.
To aim for, go after (a specified objective, situation etc.).
To follow, travel down (a particular way, course of action etc.).
To follow urgently, originally with intent to capture or harm; to chase.
To participate in (an activity, business etc.); to practise, follow (a profession).
To act as a legal prosecutor.