英语词汇invalidate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	invalidate
词根词缀	词根记忆： v. 使…无效(in无+valid有效的+ate→有效变无效)[vail,val=strong,表示"强壮"]
随便看	drawback draw back drawbridge drawdack drawdown drawer drawers draw in drawing drawing room draw into drawl draw lots drawn draw on draw out draw to a close draw up dray drayage dread dreadful dreadlocks Dreadnought dreads

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。