How to say "arch" in Japanese

• アーチCommon
  nounCovers the noun sense of 'arch': an arch-shaped structure or curve, such as in architecture. This is the straightforward word when you simply want to name or describe an arch.
• 反るそるCommon
  godan verb, intransitive verbCovers the verb sense 'to arch', as when a back or body curves; it also means 'to warp' or 'to bend', so context determines whether arching or warping is meant.
• 反りそりJLPT N1approx.Common
  nounThe noun form of 反る, meaning 'arch', 'curvature', 'bend', or 'warp'. Use it for the curve itself or the warping of an object rather than for an architectural arch, where アーチ is the natural choice.

Use 「アーチ」 for the noun meaning an arch shape or structure; use 「反る」 for the verb 'to arch' (or warp/bend), and 「反り」 for the noun referring to that curvature or warp.

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

• アーチarch
• 反るそるto warp
• 反りそりwarp
• 弓なりになるゆみなりになるto arch
• 弓なりゆみなりbow shape
• 穹窿きゅうりゅうvault