Webster's Revised Unabridged Dictionary · 1913

hassle

hassle , noun

1.
An inconvenience caused by difficulties encountered trying to accomplish a task; as, finding a parking place in midtown is always a hassle.
2.
disorderly fighting; an angry dispute or disturbance.

hassle , intransitive verb

1.
to dispute or quarrel, often over petty disagreements.
2.
To expend excessive time and energy trying to accomplish a task.

hassle , transitive verb

to repeatedly annoy; as, He is known to hassle his staff when he is overworked.