余よ水すい路ろよすいろMeanings1nounspillwayA channel or passage for surplus water to escape from a dam, reservoir, or canal.大おお雨あめでダムの水すい位いが上あがり、余よ水すい路ろから水みずが流ながれ出でた。Heavy rain raised the dam's water level, and water flowed out through the spillway.
