優秀

1. Origins, structure, and basic meaning

• Structure: 優秀, read ゆうしゅう, describes outstanding ability or performance.
• Basic usage: In 彼は優秀な成績で大学を卒業した。, he graduated from university with excellent grades.

2. Common pitfalls and similar expressions

• Modifying with な
  • Use な before a noun, as in 優秀な成績 and 優秀な人材; the word can describe both performance and people's ability.