trouble
n. C / Un. problems, difficulties, or worries. You use this when something is not working right or when you are in a difficult situation.
n. a state of difficulty, distress, or misfortune; also refers to problems or malfunctions in a system or machine.
I am having some trouble with my car today.
The manager stepped in to help when the new employee ran into trouble with the complicated software.
Despite the initial success of the merger, the company faced significant financial trouble due to unforeseen shifts in the global market and rising interest rates.
Verb is from Middle English troublen, trouble, borrowed from Old French troubler, trobler, trubler, metathetic variants of tourbler, torbler, turbler, from Vulgar Latin *turbulō, from Latin turbula (“disorderly group, a little crowd or people”), diminutive of turba (“stir; crowd”). The noun is from Middle English trouble, troble, from Old French troble, from the verb.
Uncountable when referring to general distress or effort ('to take trouble'); countable when referring to specific problems or instances of difficulty.
I have many troubles with my homeworkI have much trouble with my homeworkWhen referring to general difficulty or effort, the word is usually uncountable and should not be pluralized.