adjectival noun or quasi-adjective, takes genitive case の, noun

  1. horizontal, level, even.

Variations

Pronunciation Kanji Kana Is Common
水平 すいへい

Contained Kanji Breakdown

water
みず スイ み (1st, N5)
even, flat, peace
ヘイ たいら ひら (3rd, N3)
dry, parch, ebb
ひ.る カン ほ.す (6th, N2)
to divide