水すい平へい線せんすいへいせんCommon wordJLPTN2Meanings1nounhorizon (over water)Specifically the line where the sea or a large body of water meets the sky. Compare 地平線 for the horizon over land.See also: 地平線水すい平へい線せんに沈しずむ夕ゆう日ひが美うつくしい。The sunset sinking below the horizon is beautiful.船ふねが水