Bother is a common English word with multiple meanings:
1. As a verb: to take the trouble to do something; to make an effort
2. To annoy, worry or cause problems for someone
3. As a noun: trouble, effort or difficulty
4. In British English: used to express mild irritation or annoyance
Example sentences:
"Don't bother locking the door."
"I'm sorry to bother you, but could you help me?"
"It's such a bother to get up early on weekends."