Hopeless
Part of speech: adjective
Definition: Destitute of hope; having no expectation of good; despairing. Giving no ground of hope; promising nothing desirable; desperate;
Example sentence: If we despond, public confidence is destroyed, the people will no longer yield their support to a hopeless contest, and American liberty is no more. Through the darkness which shrouds our prospects, the ark of safety is visible. Despondency becomes not the dignity of our cause, nor the character of those who are its supporters.
Impossible
Part of speech: adjective
Definition: Not possible, not able to be doneOf a person, very difficult to deal with.
Part of speech: noun
Definition: An impossibility.(with definite article) That which seems impossible.
Example sentence: Nothing is impossible, the word itself says 'I'm possible'!