oath
noun [ C ] uk/əʊθ/ us/oʊθ/
(PROMISE)
（尤指法庭上的）誓言，誓约，宣誓
a promise, especially that you will tell the truth in a law court
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。
Synonyms: assurance (PROMISE)bond (PROMISE)commitmentguarantee pledge promise (SAY CERTAINLY)undertaking (PROMISE) vow word (PROMISE)
be under/on oath 已宣誓要讲真话
to have formally promised to tell the truth
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。
(SWEAR WORD)
old-fashioned（尤指提及神灵的）诅咒，咒骂
an offensive word, especially one that uses a name for God
muttering/mouthing oaths 低声／默默地咒骂