How to say "curvature" in Japanese

• 曲がりまがりCommon
  nounCovers the general sense of curvature — a bend or curve in a road, line, or object, and also a warp or bend that has developed. It is the everyday, neutral word for a curved shape or deviation from straightness.
• 反りそりJLPT N1approx.Common
  nounBest for an upward arch or curvature, especially a warp in flat material such as wood or a blade bending out of true. For ordinary curvature of roads or lines it is usually not the word you want.

Both words cover bend/curvature senses: use 「曲がり」 for an ordinary bend or curve, and 「反り」 when emphasizing an arch or the warping of flat material like boards or blades.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 曲がりまがりcurvature
• 反りそりwarp
• 曲率きょくりつcurvature
• 曲度きょくどcurvature
• たわみbend
• 屈曲くっきょくcrookedness