ˈtrəbəlsəm adjective
1. : giving trouble or anxiety : disturbing, vexatious
a troublesome infection
these troublesome activities of our enemies
2. archaic : characterized by disturbance : turbulent
3. archaic : afflicted , distressed
4. : requiring or involving sustained or tiring effort, attention, study, or application : difficult , burdensome , wearisome
• trou·ble·some·ly adverb
• trou·ble·some·ness noun -es