convene [ con- ( com-) = together 一起;ven = to come 來；-e=>“to come together 來到一起”→]vi. gather in one place 集合 / Congress convenes at least once a year.國會每年至少開一次會。

下面是原生詞綴co-出現(xiàn)在元音字母及h，gn前的詞例。

coagulate [ co- (com-) = together 一起;agulate = to drive 驅(qū)使=>“to drive together 驅(qū)趕到一塊去”→]v. form into a solid mass, especially from liquid (使）結(jié)塊；（使）凝結(jié) / The blood from a cut soon coagulated.傷口流出的血很快就凝固了。

coerce [co- (com-) = together 一起；ere = to restrain 約束；-e=>“to restrain together 約束在一起”→]vt. force; compel 迫使； 強(qiáng)迫 / The prisoner was coerced into confessing to the crime.犯人被迫認(rèn)罪

coercion n. 強(qiáng)迫，壓制；高壓統(tǒng)治 

coercible a. 可強(qiáng)迫的，町脅迫的

coincide [ co- (com-) = together 一 起;in = upon 在…上；cid = to fall 落；-e =>“to fall upon together—起落在…上”→]v.① occupy the same place or time重合；同時發(fā)生，時間重合/ The working hours of most businesses coincide.大多數(shù)行業(yè)的上班 時間是重合的。②agree; bealike相符；一致/ Her opinion co-incides with mine.她的意見與我一致。

coincidence n. 符合，一致；巧合

coincident a. 同時發(fā)生的；一致的