simple past tense and past participle of trouble

anxious, worried, careworn.

(Ireland, historical) The continued violence and terrorist, military and paramilitary activity in Northern Ireland that happened from the mid 1960s to the late 1990s.

(transitive, now rare) To disturb, stir up, agitate (a medium, especially water). / (transitive) To mentally distress; to cause (someone) to be anxious or perplexed.

A distressing or dangerous situation. / A difficulty, problem, condition, or action contributing to such a situation. / A violent occurrence or event.

present participle of trouble

distressing, worrying

The infliction of trouble or distress.

plural of trouble

Third-person singular simple present indicative form of trouble