betrayal ♦︎ treason ♦︎ infidelity ♦︎ bad faith ♦︎ disloyaltyThese are all words for the act of betraying sb/sth.这些词均表示背叛、出卖。PATTERNS AND COLLOCATIONS 句型和搭配◆infidelity / disloyalty to sb◆to regard / see / view sth as (a) betrayal / treason◆to be guilty of / accuse sb of treason / infidelity / bad faith / disloyalty■betrayal / /bɪˈtreɪəl/ / [uncountable, countable] (ratherformal) the act of giving information to an enemy, hurting sb who trusts you, or ignoring your principles or beliefs in order to get an advantage for yourself; the fact of being betrayed in any of these ways泄露机密的行为；不忠；（被）背叛◆The incident left me with a sense of betrayal.这件事让我感觉自己被出卖了。◆I saw her actions as a betrayal of my trust.我认为她的所作所为辜负了我的信任。◆This is a betrayal of their election promises.这是对他们在选举中所作承诺的背叛。 see also betray ⇨ cheatverb, betray ⇨ tell2■treason / /ˈtriːzn/ / ( ˌhigh ˈtreason) [uncountable] the crime of doing sth that could cause danger to your country, such as helping its enemies during a war危害国家罪，叛国罪（如战时通敌）◆They were charged with treason and sentenced to death.他们被指控犯有叛国罪，判了死刑。■infidelity / /ˌɪnfɪˈdeləti/ / [uncountable, countable] (ratherformal) the act of not being faithful to your wife, husband or partner, by having sex with sb else（夫妻或伴侣间的）不忠；通奸◆His reputation has been damaged by allegations of marital infidelity.他被指对婚姻不忠，名誉受到了损害。◆She could not forgive his infidelities.她无法原谅他的不忠行为。OPPfidelityⓘ Fidelity is the quality of being faithful to your wife, husband or partner. * fidelity指对妻子、丈夫或性伴侣的忠贞、忠实◆marital / sexual fidelity婚姻／性的忠贞■ˌbad ˈfaith [uncountable] (formalorlaw法律) the intention of deceiving sb, especially of not keeping a promise, even at the time that you make the promise存心不良；恶意（尤指不履行承诺的意图）◆He accused the local authority of acting in bad faith, in making promises that it knew it would not be able to keep.他指控地方当局恶意行事，许下明知无法兑现的承诺。OPPgood faith ⇨ truth■disloyalty [uncountable] (ratherformal) behaviour that involves not being loyal or faithful to your friends, family or country（对朋友的）不守信义；（对家庭、国家的）不忠实，不忠诚◆She felt guilty of disloyalty to her dead husband.她因对死去的丈夫不忠而感到内疚。OPPloyalty ⇨ reliable1 see also disloyal ⇨ treacherous