trouble

(noun): A distressing or dangerous situation.
(noun): A difficulty, problem, condition, or action contributing to such a situation.
(noun): A violent occurrence or event.
(noun): Efforts taken or expended, typically beyond the normal required.
(noun): A malfunction.
(noun): Liability to punishment; conflict with authority.
(noun): A fault or interruption in a stratum.
(verb): To disturb, stir up, agitate (a medium, especially water).
(verb): To mentally distress; to cause (someone) to be anxious or perplexed.
(verb): In weaker sense: to bother or inconvenience.
(verb): To take pains to do something.
(verb): To worry; to be anxious.
(noun): (Australian rhyming slang) Wife.

He was in trouble when the rain started.
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.
the troubles in Northern Ireland
It's no trouble for me to edit it.
He's been in hospital with some heart trouble. My old car has engine trouble.