Translation of "oath" - English-Mandarin Chinese dictionary

oath

noun [ C ] (PROMISE) 承诺 uk us /əʊθ/ US  /oʊθ/

a promise, especially that you will tell the truth in a law court

(尤指法庭上的)誓言,誓约,宣誓
Medieval knights took an oath of allegiance/loyalty to their lord. 中世纪骑士宣誓效忠于君主。
The witness placed her hand on the Bible and took the oath (= promised to tell the truth). 证人将手放在《圣经》上,起誓要讲真话。
be under/on oath

to have formally promised to tell the truth

已宣誓要讲真话
The judge reminded the witness that she was under oath. 法官提醒证人她宣过誓要据实作证。

(Translation of “oath noun (PROMISE)” from the Cambridge English-Chinese (Simplified) Dictionary © Cambridge University Press)