Promising :: Promising (a.) Making a promise or promises; affording hope or assurance; as, promising person; a promising day..
Promisor :: Promisor (n.) One who engages or undertakes; a promiser.
Promissive :: Promissive (a.) Making a promise; implying a promise; promising.
Promissory :: Promissory (a.) Containing a promise or binding declaration of something to be done or forborne.
Uncompromising :: Uncompromising (a.) Not admitting of compromise; making no truce or concessions; obstinate; unyielding; inflexible.
Unpromise :: Unpromise (v. t.) To revoke or annul, as a promise..