blood oath

noun

: an oath taken by two or more people in which they ceremonially use or exchange each other's blood

broadly : a very serious or solemn oath

… she'd have to sign a blood oath promising that no matter what happened she'd never leave once that child was born …

Ron Harris, Elle, March 1993

Back when we were 17, we all took a blood oath to record three albums of 30-minute punk rock, and nobody would get to leave until we'd done just that.

Pelle Almqvist, Spin, November 2007

Word History

First Known Use

1856, in the meaning defined above

单词	blood oath
释义	blood oath noun : an oath taken by two or more people in which they ceremonially use or exchange each other's blood broadly : a very serious or solemn oath … she'd have to sign a blood oath promising that no matter what happened she'd never leave once that child was born … Ron Harris, Elle, March 1993 Back when we were 17, we all took a blood oath to record three albums of 30-minute punk rock, and nobody would get to leave until we'd done just that. Pelle Almqvist, Spin, November 2007 Word History First Known Use 1856, in the meaning defined above
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