Promissory (adjective)

Relating to or serving as a promise or a commitment to do or pay something.

Origin:

From the latin word promissōrius, meaning 'relating to a promise'.

Examples:

1. The promissory note was a legally binding document that obligated the borrower to repay the loan.
2. The promissory letter was a commitment by the company to invest in the project.
3. The promissory oath was a pledge by the doctor to uphold the ethical standards of the profession.
4. The promissory agreement was a binding contract between the parties.
5. The promissory signature was a symbol of the individual's commitment to honor the debt.