悩み事

1. Origins, structure, and basic meaning

• Structure: 悩み事 is read なやみごと and means a worry or troubling matter.
• Basic usage: It is used in contexts of keeping worries to oneself or confiding in a friend.

2. Common pitfalls and similar expressions

• 抱え込む and 打ち明ける
  • 抱え込む(かかえこむ) focuses on taking a burden upon oneself, while 打ち明ける(うちあける) focuses on revealing previously private thoughts or circumstances to someone.