1.concerning prep.关于(regarding)；就…而言(relating to)

词根记忆：来自concern(v.涉及，关系到)

例:More evidence conceming women became available to historical researchers.

2.concert n.一致(agreement in design or plan);音乐会(a public performance of music)

词根记忆：con(共同)+cert(确实的事)--共同确定的事--一致

例:He is working in concert with his colleagues.//concert tour巡回音乐会

3.concession n．让步(the act of conceding)

词根记忆：con+cess(行走，前进)+ion一向后走一让步

例:It is important to continuously test the market and use the results to secure concessions from existing suppliers.

同根词：secession(n.脱离;分离)

4.conclude v.推断，做结论(to reach as a logically necessary end by reasoning)

词根记忆：con+clud(关闭)+e一关闭，闭幕一做结论

例:Many analysts conclude that evidence of a recovering automotive market remains slight.

派生词：conclusion(n．结论，结局)

同根词：preclude(v.预防;杜绝)

5.concrete a．具体的，有形的(actual, definite);n.混凝土(a hard strong building material made by mixing cement with sand,gravel etc.and water)

联想记忆：混凝土( concrete)当然是具体的，有形的(concrete)

例:a concrete instance 一个具体的例子

6.concurrent a.同时发生的(simuttaneous)

词根记忆：con+current(发生的)--同时发生的

例:A concurrent sharp decline in the populations of seals and sea lions was certainly caused by a pollution-related disease.

7.condemn v.声讨，谴责(to criticize)

词根记忆：con+demn(=damn伤害)--共同伤害--谴责

例:The principal condemned smoking by students at school.

派生词：condemnation(n.谴责，定罪)

同根词：damnify(v.损害)；indemnify(v.赔偿，补偿)

8.condense v.使冷凝，浓缩(to make denser)；缩短(to contract)

词根记忆：con(一起)+dense(变浓厚)--浓缩

例:Warmed by the Sun, ocean water evaporates, rises high into the atmosphere, and condenses in tiny droplets on minute particles of dust to form clouds.

派生词：condensation(n.浓缩)

9.condescending a.俯就的，屈尊的(patronizing)；有优越感的(displaying a superior attitude)

词根记忆：来自condescend(v.屈尊)

例:The professor had a condescending attitude toward uneducated people.

同根词：descend(v.下降)；ascend(v.上升)

10.condition n．条件(a restricting or modifying factor)；情况(situation)；环境(environ-ment)

例:Several senior officials spoke to the press on condition that they not be named in the story.