To be undecided about; to lack confidence in; to disbelieve, to question.
Disbelief or uncertainty (about something); (countable) a particular instance of such disbelief or uncertainty.
To give grounds for expectation, especially of something good.
To commit to (some action or outcome), or to assure (a person) of such commitment; to make an oath or vow.
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.
A placeholder object representing the eventual result of an asynchronous operation.
Reason to expect improvement or success; potential.
an oath or affirmation; a vow