誓せい書しょ

noun

written oath; written pledge

A formal document in which one swears or promises something in writing. Similar to 誓約書 (せいやくしょ), but 誓書 is less common and may appear in legal or solemn contexts.

See also: 誓約書

• 彼かれは裁さい判ばん所しょに誓せい書しょを提てい出しゅつした。

  He submitted a written oath to the court.