"negation" (mainly in pro and con), 1570s, short for Latin contra "against" (see contra).
con (n.2)
"study," early 15c., from Old English cunnan "to know, know how" (see can (v.1)).
con (adj.)
"swindling," 1889, American English, from confidence man (1849), from the many scams in which the victim is induced to hand over money as a token of confidence. Confidence with a sense of "assurance based on insufficient grounds" dates from 1590s.
con (n.3)
a slang or colloquial shortening of various nouns beginning in con-, such as, from the 19th century, confidant, conundrum, conformist, convict, contract, and from the 20th century, conductor, conservative.
con (v.1)
"to guide ships," 1620s, from French conduire "to conduct, lead, guide" (10c.), from Latin conducere (see conduce). Related: Conned; conning.
con (v.2)
"to swindle," 1896, from con (adj.). Related: Conned; conning.
实用例句
1. Well, so much for the producers. But what of the con-sumers?
好吧，关于生产商就讲这么多，那关于消费者呢？
来自柯林斯例句
2. Slimming snacks that offer miraculous weight loss are a con.
有神奇减肥效果的瘦身点心是一个骗局。
来自柯林斯例句
3. She travels con-stantly, moving among her several residences around the world.
她经常旅行，穿梭于她在世界各地的多处住所。
来自柯林斯例句
4. He was lost in the con-templation of the landscape for a while.
有一会儿，他怔怔地注视着周围的景物。
来自柯林斯例句
5. The bus is a 45-seater with air-con and videos.