con (n.1, adv.)

“否定; 消极的; 反对某项提案的论点, 论证者或投票者” (主要见于 pro and con), 1570年代, 是拉丁文 contra “反对” 的简称(见 contra (前言, 副词) ). 比较 pro (n. 2).

con (adj.)

“诈骗”, 1889年(载于 con man), 美式英语, 来自 confidence man (1849年), 来自许多骗局, 其中受害者被诱导交出金钱作为信任的象征. Confidence, 带有“基于不充分理由的保证” 之意, 可追溯到1590年代. Con artist 到1910年得到印证.

con (v.1)

“引导船只, 下达驾驶船只的命令”, 1620年代, 来自法语 conduire “指挥, 领导, 引导” (10世纪), 来自拉丁语 conducere “领导或汇集, 贡献, 服务”, 来自 com “与, 一起” (见 com-) + ducere “领导” (来自PIE根 *deuk- “领导” ). 作为名词, “驾驶船只的行动或职位”, 1825年. 相关: Conned; conning. Conning tower “铁甲战舰或潜艇的圆顶形驾驶室” 从1865年开始得到证明.

con (v.2)

“诓骗”, 1896年, 来自 con (adj. 相关链接: Conned; conning.

con (v.3)

“研究, 了解, 仔细阅读”, 13世纪, cunnen, “做出尝试, 尝试或设法去做”, 来自古英语 cunnian “了解” (见 can (v. 1) ). 相关链接: Conned; conning.

con (n.2)

con- 开头的各种名词的俚语或口语缩写, 例如, 从19世纪开始, confidant, conundrum, conformist, convict, contract, 从20世纪开始, conductor, conservative.

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Definitions of con from WordNet
con (n.)
an argument opposed to a proposal;
con (n.)
a person serving a sentence in a jail or prison;
Synonyms: convict / inmate / yard bird / yardbird
con (n.)
a swindle in which you cheat at gambling or persuade a person to buy worthless property;
Synonyms: bunco / bunco game / bunko / bunko game / confidence trick / confidence game / con game / hustle / sting / flimflam
con (v.)
deprive of by deceit;
Synonyms: victimize / swindle / rook / goldbrick / nobble / diddle / bunco / defraud / scam / mulct / hornswoggle / short-change
con (v.)
commit to memory; learn by heart;
Synonyms: memorize / memorise / learn
con (adv.)
in opposition to a proposition, opinion, etc.;
much was written pro and con