One of the mysteries of the English language finally explained.
Chiefly in Mexico and the south-western United States: an irrigation channel.
Early 19th century. From Spanish acequia irrigation channel (1113; also † azequia, † açequia, † asequia; many examples in early use show borrowing of the Spanish word into post-classical Latin) from Arabic al-sāqiya from al- the + sāqiya.
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