英语词汇unnecessary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	unnecessary
词根词缀	词源： 1548, from un- (1) "not" + necessary.
随便看	proficiency in proficient profile profit profitable profiteer profligate profound profundity profuse profusion prog progenitor progeny progesterone prognosis prognostic prognostication program programme progress progression progressive prohibit prohibition

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。