downspout
noun🔊/ˈdaʊnspaʊt/
🔊/ˈdaʊnspaʊt/
(North American English) (also drainpipe British and North American English)
a pipe that carries rainwater from the roof of a building to a drain （把雨水从屋顶输送到下水道的）雨水管，排水管