高こう潮ちょう線せんこうちょうせんMeanings1nounhigh-water markRefers to the line or mark left on a shore or structure indicating the highest level reached by water, especially during a flood or high tide.高こう潮ちょう線せんが堤てい防ぼうの上うえまで達たっしていた。The high-water mark reached the top of the embankment.
