英语词汇countdown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	countdown
词根词缀	词源： 1953, Amer.Eng., in early use esp. of launches of rockets or missiles, from count (v.) + down.
随便看	ultra ultra- ultraclean ultraliberal ultralight ultramarine ultramilitant ultramodern ultramontane ultramundane ultrapure ultra-reactionary ultrared ultrasonic ultraviolet ululation Ulysses um Umayyad umber umbilical umbles umbra umbrage umbrageous

英语词根词缀词典收录了31503条英语词根词缀词条，基本涵盖了全部常用英语词汇的词根、词缀及词根记忆法解析，是记忆英语词汇的必备工具。