英语词汇invalidity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	invalidity
词根词缀	Online Etymology Dictionary 词根李平武蒋争 invalidity n. 1540s, from Latin invalidatus (see invalid, adj.). 〔蒋〕[val强，-ity名词后缀] (因病残而)丧失工作能力
随便看	tack tack-hammer tackle tacky taco Tacoma Taconic tact tactful tactic tac(tic) -tactic tactical tactician tactics tactile tactility tactless tact, tag tact, tang, tag, tig, ting -tact-, -ting-, -tang-, -tag- tactual -tacular tad tadpole

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。