煩う

1. Origins, structure, and basic meaning

• Structure: 煩う is read わずらう and means suffering from worry or anxiety.
• Basic usage: Both examples use 思い煩う for dwelling on the future or on an unresolved problem.

2. Common pitfalls and similar expressions

• Same reading, different spelling
  • 煩う for being troubled by worry and 患う for suffering an illness are both read わずらう, but their contexts differ.
• Continuation and lack of necessity
  • 思い煩っていた describes worry continuing at the time.
  • 思い煩う必要はない means there is no need to keep worrying.