swear to 1. 对(神等)起誓 2. 就…宣誓作证；就…起誓表示 I don't remember the man's appearance well enough to swear to in court. 那男子的外貌我记得不够真切，不能在法庭上宣誓作证。 Will you swear to the truth of what you said? 你愿起誓保证所说属实吗? 3. 断言…确凿无疑，断定 He swore to having seen that movie some time before. 他断言说他不久前肯定看过那部电影。 I couldn't swear to its having been done. 我不能肯定那事是否做了。