著しい

1. Origins, structure, and basic meaning

• Structure: 著しい is read as いちじるしい and is an い-adjective describing a change or difference as conspicuous, remarkable, or significant.
• Basic usage: It modifies a noun in 著しい変化 and serves as the predicate in 技術の向上が著しい.

2. Common pitfalls and similar expressions

• Noticeable degree
  • It means more than simply large; it presents a change, improvement, or difference as clearly noticeable against another state or reference point.
• Difference from すごい
  • すごい is a broad everyday expression often conveying surprise, while 著しい suits formal descriptions of objectively notable change or difference.