A distressing or dangerous situation.

“He was in trouble when the rain started.”

A difficulty, problem, condition, or action contributing to such a situation.

“The trouble was a leaking brake line.   The trouble with that suggestion is that we lack the funds to put it in motion.   The bridge column magnified the trouble with a slight tilt in the wrong direction.”

A violent occurrence or event.

“the troubles in Northern Ireland”

To disturb, stir up, agitate (a medium, especially water).

To mentally distress; to cause (someone) to be anxious or perplexed.

“What she said about narcissism is troubling me.”

In weaker sense: to bother or inconvenience.

“I will not trouble you to deliver the letter.”

(Australian rhyming slang) Wife.