曲面

1. Origins, structure, and basic meaning

• Structure: 曲面(きょくめん) means a curved rather than flat surface.
• Basic usage: It describes a reflection looking slightly distorted because the mirror's surface is curved.
  • この鏡は曲面になっており、像が少しゆがんで見える。

2. Common pitfalls and similar expressions

• The homophone 局面
  • 局面(きょくめん) means a situation or stage in the development of events. A curved physical surface is written 曲面, while a stage of affairs is written 局面.