Merriam-Webster's Collegiate® Dictionary, 11th Edition
PRICK
I. noun
Etymology: Middle English prikke, from Old English prica; akin to Middle Dutch pric prick Date: before 12th century a mark or shallow hole made by a pointed instrument,
2. a pointed instrument or weapon, a sharp projecting organ or part, an instance of pricking or the sensation of being pricked: as, a nagging or sharp feeling of remorse, regret, or sorrow, a slight sharply localized discomfort , penis , a spiteful or contemptible man often having some authority,
II. verb Date: before 12th century transitive verb to pierce slightly with a sharp point, to affect with anguish, grief, or remorse , to ride, guide, or urge on with or as if with spurs ; goad , to mark, distinguish, or note by means of a small mark, to trace or outline with punctures, to remove (a young seedling) from the seedbed to another suitable for further growth, to cause to be or stand erect , intransitive verb
1. to prick something or cause a pricking sensation, to feel discomfort as if from being pricked,
2. to urge a horse with the spur, to ride fast, thrust , to become directed upward ; point