曲線

1. Origins, structure, and basic meaning

• Structure: 曲線, read きょくせん, means a line that bends rather than extending straight.
• Basic usage: It describes a line drawn by hand and the shape of a river winding across a plain.
  • 定規を使わず、手で滑らかな曲線を描いた。

2. Common pitfalls and similar expressions

• Figurative 描く
  • 曲線を描く can mean drawing a curve, but it can also describe a river or movement forming a curved shape.