trouble

to disturb the mental calm and contentment of; worry; distress; agitate.

to put to inconvenience, exertion, pains, or the like.

to cause bodily pain, discomfort, or disorder to; afflict.

to annoy, vex, or bother.

to disturb, agitate, or stir up so as to make turbid, as water or wine.

to put oneself to inconvenience, extra effort, or the like.

to be distressed or agitated mentally; worry.

difficulty, annoyance, or harassment.

unfortunate or distressing position, circumstance, or occurrence; misfortune.

civil disorder, disturbance, or conflict.

a physical disorder, disease, ailment, etc.; ill health.

mental or emotional disturbance or distress; worry.

an instance of this.

effort, exertion, or pains in doing something; inconvenience endured in accomplishing some action, deed, etc..

an objectionable feature; problem; drawback.

something or someone that is a cause or source of disturbance, distress, annoyance, etc.

a personal habit or trait that is a disadvantage or a cause of mental distress.

the Troubles,

1. the violence and civil war in Ireland, 1920–22.

2. the conflict between Protestants and Catholics in Northern Ireland, beginning in 1969.