swear/swɛr; sweə/v past tense swore /swɔr; swɔː/past participle sworn /swɔrn; swɔːn/1 [I] to use rude or offensive language 咒骂﹐诅咒﹔说脏话: She doesn’t smoke, drink, or swear. 她不抽烟不喝酒﹐也不说脏话。+at He swore at me. 他用粗话骂我。2 [T] to promise that you will do something 发誓﹐起誓: swear to do sth Do you swear to tell the truth? 你发誓讲真话吗?+(that) I swear I’ll never leave you. 我发誓永不离开你。see box at见 PROMISE1 方框3 [T] to say very strongly that what you are saying is true 发誓保证〔自己说的是真话〕: +(that) She swore that she had never seen him before. 她发誓以前从来没有见过他。I never touched your purse, I swear . 我绝对没有碰过你的钱包﹐我发誓。4 I could have sworn (that) spoken used to say that you were sure about something【口】我明明记得…: I could have sworn I left my keys here. 我明明记得把钥匙放在这里的。swear by sthphr v informal to strongly believe that something is effective【非正式】极其信赖: Heidi swears by aromatherapy. 海蒂坚信芳香疗法有效。swear sb in phr v if someone is sworn in, they make a public promise before beginning an important job or before speaking in court 使宣誓就职﹔使在法庭上宣誓: She was sworn in as president. 她宣誓就任总统。