bother

Something or someone that causes trouble; a source of unhappiness.

“a bit of a bother”

An angry disturbance.

“a spot of bother”

To cause inconvenience or discomfort to.

Take the trouble to do something; concern oneself.

“Don't bother, please”

Cause annoyance in; disturb, especially by minor irritations.

“Mosquitoes buzzing in my ear really bothers me”

Intrude or enter uninvited.

“Don't bother the professor while she is grading term papers”

Make confused or perplexed or puzzled.

Make nervous or agitated.

“The mere thought of her bothered him and made his heart beat faster”