英语词汇trooper的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

词汇	trooper
词根词缀	Online Etymology Dictionary trooper n. 1630s, "soldier in a cavalry troop," from troop, n. + -er(1). Extended to "mounted policeman" (1858, in Australia) then to "state policeman" (U.S.) by 1911.
随便看	electrode electro-, electr-, electri- electroencephalogram electrolysis electrolyte electromagnet electromagnetic electromagnetism electromotor electron electronic electronic mail electronics electropathy electrophone electrophorus electroplate electrotherapy electrotype electrum eleemosynary eleg elegance elegant elegiac

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