A worry, trouble, or distress; personal problems or emotional anguish.
将来のことが悩みで夜もよく眠れない。
I'm so worried about the future that I often can't sleep at night.
友達に悩みを相談したら、気持ちが楽になった。
When I talked about my worries with a friend, I felt better.
親の介護が大きな悩みの種だ。
Caring for my parents is a major source of worry.