spate (n.)youdaoicibaDictYouDict[spate 词源字典]
early 15c., originally Scottish and northern English, "a sudden flood, especially one caused by heavy rains or a snowmelt," of unknown origin. Perhaps from Old French espoit "flood," from Dutch spuiten "to flow, spout;" related to spout (v.). Figurative sense of "unusual quantity" is attested from 1610s.[spate etymology, spate origin, 英语词源]