"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.
例文
1. Well,so much for the producers.But what of the con -sumers?
いいでしょう、メーカーについてはこれだけ言いますが、消費者については?
2.Slimming snacks that offer miraculous weight loss are a con .
不思議なダイエット効果のあるダイエット菓子はペテンだ。
3.She travels con -stantly,moving among her several residences around the world.
彼女は世界中の多くの場所を旅している。/
4.He was lost in the con ?templation of the landscape for a while.
しばらく、彼はぼんやりと周囲の景色を見つめていた。/
5.The bus is a 45-seater with air- con and videos.