Meaning and Usage
The word 曲線 (きょくせん) means "curve" and is commonly used in contexts involving shapes, graphs, roads, and mathematics. It refers to any line that is smoothly bending without sharp angles.
Common Contexts
You will often see 曲線 used when talking about graphs showing trends, roads or paths that bend, and mathematical curves defined by equations. It is a neutral, formal noun suitable for academic, technical, and everyday use.
Collocations and Patterns
- 曲線を描く (きょくせんをえがく): to draw a curve; used when describing shapes or graphs.
- 曲線の方程式 (きょくせんのほうていしき): equation of a curve; common in math.
- 曲線道路 (きょくせんどうろ): curved road; used in traffic or geography.
Usage Tips
When using 曲線, speakers imply a smooth, flowing line rather than a straight or angular one. It is often contrasted with 直線 (ちょくせん), meaning "straight line." Learners sometimes confuse 曲線 with 曲がる (まがる), a verb meaning "to turn" or "to bend." Remember 曲線 is a noun referring to the shape itself, not the action of bending.
Use 曲線 when describing shapes, graphs, or paths that are curved, especially in formal or technical contexts.