平滑(へいかつ)

へいかつ
adjective-na
smooth; flat; even
1. smooth; flat; even
Describes a surface or texture that is free of bumps, roughness, or irregularities. Used in technical, scientific, and descriptive contexts.
表面(ひょうめん)が平滑(へいかつ)だ。
The surface is smooth.
平滑(へいかつ)な仕上(しあ)がりにするために、丁寧(ていねい)に磨(みが)いた。
I polished it carefully to achieve a smooth finish.
この素材(そざい)は平滑(へいかつ)で汚(よご)れが付(つ)きにくい。
This material is smooth and resistant to stains.

A na-adjective composed of 平(へい) (flat) and 滑(かつ) (smooth, slippery). Primarily used in technical, manufacturing, and scientific writing to describe smooth surfaces. Less common in everyday casual speech, where なめらか or すべすべ would be preferred.

COMMON COLLOCATIONS:

  • 平滑(へいかつ)な表面(ひょうめん): smooth surface
  • 平滑(へいかつ)筋(きん): smooth muscle (anatomy)
  • 平滑(へいかつ)に仕上(しあ)げる: to finish smoothly
  • 平滑(へいかつ)化(か): smoothing, leveling

SIMILAR WORDS:

  • なめらか: smooth — everyday word for smooth textures, also used for graceful movement
  • すべすべ: smooth to the touch — onomatopoeia, used for skin and surfaces in casual speech
  • 円滑(えんかつ): smooth, harmonious — used for processes, relationships, not physical surfaces
  • 滑(なめ)らか: smooth — more literary variant of なめらか
general
Added 2026.4.8 16:44
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