rush (n.2)youdaoicibaDictYouDict[rush 词源字典]
"a hasty driving forward," late 14c., from rush (v.). Sense of "mass migration of people" (especially to a gold field) is from 1848, American English. Football/rugby sense from 1857. Meaning "surge of pleasure" is from 1960s. Rush hour first recorded 1888. Rush order from 1896.[rush etymology, rush origin, 英语词源]