noun
written oath; pledge; covenant
A formal written document in which one swears or promises to do something. Often used in legal, business, or official contexts.
入社時に秘密保持の誓約書を提出した。
I submitted a written pledge of confidentiality when I joined the company.
契約の前に、双方
Before the contract, both parties need to sign a written covenant.
契約書 is a general contract document, whereas 誓約書 specifically involves a sworn promise or oath.
Compound of 誓約 (pledge, oath) and 書 (document).