厄介

1. Origins, structure, and basic meaning

• Structure: 厄介 is read やっかい and describes something troublesome to handle or deal with.
• Basic usage: Use 厄介だ to end a clause and 厄介な before a noun, as in 厄介な問題.

2. Common pitfalls and similar expressions

• Burden rather than difficulty alone
  • 難しい can focus on how hard something is to understand or accomplish.
  • 厄介 suggests troublesome handling, such as extra work or complications.