correspond [ cor- ( com-) = with 与;respond = to answer 应答=>“to answer with 与…相应答”→]vi.①be in agreement符合， 一致 / His promise and his performance do not correspond.他的目行不一。② exchange letters 通信 / We have been corresponding for ten years.我们已经保持了 10年的通信关系。 correspondence n. 符合，一致；通信联系 

correspondent n. 对应物；通信者；记者

下面各举一例说明出现在其它辅音字母前的情况。

concentrate [ con- ( com-) = together 一 起；centr = centre 中心； -ate v. = to cause to be 使=>“to cause to be together in a centre 使共处于一中心”→]vt. bring in one place together 集中 / The fire chief concentrated his men to fight the blaze.救火队队长把手下人集中起来扑灭大火。

concentration n .集中；专心

condole [ con- ( com-) = with 与；dol = to grieve 悲伤；-e=>“to grieve with 与...起悲伤→]vi. express sympathy; commiserate 吊唁；同情 / They condoled with the widow at the funeral. 他们在葬礼上向死者遗孀表示衰悼。

condolence n.吊唁，吊慰；慰问，同情 

condolatory a .吊唁的；表示慰问的

conform [ con- ( com- ) = with 与;form = to shape 造型=>“to shape together with 与...一起造型”→]v. be in agreement —致，符合 / If you wish to be a member, you must conform to the rules of our club.你要想加人我们倶乐部，就得遵守它的规则。

conformity n. 依照；符合

congest [ con- (com-) = together 一起;gest = to carry 运送=>“to carry together 都送到一起来”→]vt. fill too full; overcrowd 充满；拥挤 / Main street is congested with people driving to work each morning.每天早晨梅恩大街都挤满了开车上班的人。

congestion n. 充满；拥挤