Pest

The primary meaning of pest is an animal which has characteristics which people regard as being injurious or harmful.

By extension, pest can refer also to a contagious deadly disease, a pestilence such as the Bubonic plague.

By further analogy, pest in the slang sense can refer to an annoying person, especially one difficult to get rid of.

Pest, with a different pronunciation, is also the name of a county and former city in Hungary.

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