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weir

noun
🔊/wɪə(r)/
🔊/wɪr/
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  1. a low wall or barrier built across a river in order to control the flow of water or change its direction堰；拦河坝；导流坝
    • Flood water was pouring over the weir in a thundering torrent.洪水泛滥，洪水泛滥。
    Topics Geographyc2
    Word OriginOld English wer, from werian ‘dam up’.