troubled

Concise Oxford English Dictionary © 2008 Oxford University Press:
trouble/ˈtrʌbl/

▶noun

• 1 difficulty or problems.

  ■ failure to function properly.

• 2 effort or exertion, especially when inconvenient: I don't want to put you to any trouble.

  ■ a cause of worry or inconvenience.

  ■ (often in phr. in trouble) a situation in which one is liable to incur punishment or blame.

• 3 public unrest or disorder.

▶verb cause distress or inconvenience to.

■ (as adj. troubled) showing or experiencing problems or anxiety.

■ (trouble about/over/with) be distressed or anxious about.

■ (trouble to do something) make the effort required to do something.

– phrases
look for trouble informal behave in a way that is likely to provoke an argument or fight.
trouble and strife Brit. rhyming slang wife.

– derivatives
troubler noun.

– origin ME: from OFr. truble (n.), trubler (v.), based on L. turbidus (see turbid).