promissory
Promissory (adj) means containing or amounting to a formal promise, especially to pay money. Example: “He signed a promissory note agreeing to repay the loan within a year.”
How to use promissory
Learner’s notesIn plain EnglishDescribes a written promise, usually about paying a debt.
Fill the gap
Can you complete this real example?
He signed a _____ note agreeing to repay the loan within a year.
Etymology
From Medieval Latin prōmissōrius, built on the same root as promise.