promise
/ˈpɹɒmɪs/
An oath or affirmation; a vow
if I make a promise, I always stick to it; he broke his promise
A transaction between two persons whereby the first person undertakes in the future to render some service or gift to the second person or devotes something valuable now and here to his use
Reason to expect improvement or success; potential
She shows great promise as an actress.
A placeholder object representing the eventual result of an asynchronous operation
Bestowal or fulfillment of what is promised