頂点

1. Origins, structure, and basic meaning

• Structure: 頂点 is a noun read ちょうてん, meaning a vertex where lines meet or the highest point in a field.
• Basic usage: It can identify a vertex of a triangle or the pinnacle of a skill reached after long training.
  • 三角形の頂点に印を付けた。 says that a vertex of the triangle was marked; 彼は長い修業を経て技術の頂点に立った。 says that he reached the pinnacle of his craft after long training.

2. Common pitfalls and similar expressions

• 頂点に印を付ける
  • に marks a vertex of the triangle as the place where the mark was made.
• 頂点に立つ
  • Figuratively, this means reaching the highest level in a skill or field.
• 頂点 and 頂上
  • 頂点 covers a geometric vertex and an abstract pinnacle, while 頂上 mainly denotes the top of a mountain or other high place.