assault
同义：attack , offense , assail
反义：defense , protection , safeguard

派生： assaultive adj. 狂暴的，想行凶的 He was not just mad, he was ~ and on the verge of committing murder. 他不仅仅疯了，而是狂暴到要杀人的地步。

assemble
同义：gather
反义：disperse , dismiss , dissolve
派生： assembly n. 集合，集会，会议；装配，组装：prohibit unlawful ~禁止非法集会词组： assembly line （工厂）装配线
练习： They introduced a new ____line.
A. assembly B. assembing C. resemble D. production
练习答案：选 A
译文：他们引进了一条新的装配线。assembly line装配线，是固顶词组；assemble是动词，装配；resemble相像；production产量。
assert
同义：declear , state , pronounce
辨析：assert , affirm , state , declare , announce assert
意为“断言，声称，声明”，正式用语，后面接名词或“ that”引起的从句。
The defendants asserted his innocence. affirm 正式用语，意为“断言，肯定”The minister affirmed the truth of the statement in the news conference. state意为“声明，陈述”，后面接名词或“ that”引起的从句。The workers have stated that the strike will continue until general agreement is reached about pay and working conditions. declare意为“宣布，宣告，宣称”。同“state”相近，但主要指口头上的声明，后面接名词或“that”引起的从句。In the same year, Britain declared war against Germany. announce 意为“宣布，宣告”，后面接名词或“ that”引导的从句。He announces football games on TV.
反义：deny , contradict
词组： ~ oneself
坚持自己的权利（或意见）；迫使人们承认自己的权利；显示自己的权威（或威力） By 1206 Genghis khan had ~ed himself as overall chief of the Mongol tribes.到1206年，成吉思汗已迫使人们承认自己为蒙古各部落的总首领。
派生： assertion   n. 语气肯定（或坚定）的话，断言：make an ~ 做断言 assertive adj.武断的，过分自信的 speak in an ~ tone 以过分自信的口吻说