来自古英语ath,发誓，以神的名义起誓所言为真，来自Proto-Germanic*aithaz,来自PIE*oito,发誓。引申词义诅咒。

1. His girlfriend had gone into the witness box and taken the oath.

他的女朋友进入证人席并立了誓。

2. Under oath, Aston finally admitted that he had lied.

在宣誓的约束下，阿斯顿终于承认自己撒了谎。

3. The constitution requires members of parliament to take an oath of allegiance.

宪法规定，议员必须宣誓效忠。

4. I have sworn an oath to defend her.

我发誓要保护她。

5. Three officers gave evidence on oath against him.

3位警官经宣誓提出了对他不利的证据。