Annoyance is an unpleasant mental state that is characterized by such effects as irritation and distraction from one's conscious thinking. The words definition is also similar to the word perturb, however, perturb has been replaced with the English word, disturb in modern English society. It can lead to emotions such as frustration and anger. An annoyance is a stimulus that can produce a state of annoyance in a person. It can be in the form of a persistent and mild physical stimulus, a younger/older sibling, a delayed train, an immature friend or the continued hindrance from achieving a goal. Often severe and deliberate annoyance can be caused by somebody in a close vicinity, such as the room next to yours, who is tapping or slapping a desk or fixed object continuously and to various beats. Etymology "Annoy" (like the French ennui, a word traced by etymologists to a Latin phrase, in odio esse, to be "in hatred" or h