plural of trouble
"The new engine caused several mechanical troubles that delayed our journey."
Third-person singular simple present indicative form of trouble
"He troubles me whenever he asks about my personal life."
In plain English: To cause problems for someone by making them feel upset, worried, or annoyed.
"The loud noise from the construction site is troubling me all day long."
The continued violence and terrorist, military and paramilitary activity in Northern Ireland that happened from the mid 1960s to the late 1990s.
"Many people grew up hearing stories about the Troubles from their grandparents who lived through that turbulent era in Northern Ireland."