英语词汇protractor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	protractor
词根词缀	Online Etymology Dictionary 词根李平武蒋争 protractor n. 1610s, "one who lengthens (an action)," from Medieval Latin protractor, agent noun from Latin protrahere "to draw forward" (see protraction); sense of "instrument for drawing angles" first recorded 1650s. 〔蒋〕[tract=draw拉，抽，引，-or表示人] 延长者，拖延者
随便看	self-examination self-explanatory self-feeder self-glorification self-government self-help selfie self-image self-immolation self-important self-improvement self-incrimination self-indulgence self-indulgent self-inflict self-interest self-involved selfish self-justification selfless self-love self-made self-motivation clock clock-radio

英语词根词缀词典收录了54763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。