Definitions of bother:

• noun:   something or someone that causes trouble; a source of unhappiness

  Example: "A bit of a bother"

• noun:   an angry disturbance

  Example: "A spot of bother"

• verb:   make confused or perplexed or puzzled
• verb:   make nervous or agitated

  Example: "The mere thought of her bothered him and made his heart beat faster"

• verb:   intrude or enter uninvited

  Example: "Don't bother the professor while she is grading term papers"

• verb:   take the trouble to do something; concern oneself

  Example: "Don't bother, please"

• verb:   cause annoyance in; disturb, especially by minor irritations

  Example: "Mosquitoes buzzing in my ear really bothers me"

• verb:   to cause inconvenience or discomfort to