Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
Wiktionary
a. Not rewarded
WordNet
adj. having acquired or gained nothing; "the returned from the negotiations empty-handed" [syn: empty-handed]
Usage examples of "unrewarded".
Whoever Shellduck was he certainly knew ways of disappearing with the loot leaving Big Tommy looking small and the rest of the gang bad-tempered and unrewarded.
The demurest of fuliginous intriguers argued that Brail stone was but doing the spiriting required of him, and would have to pay the penalty unrewarded, let him Italianize as much as he pleased.
Madame d'Urfe approved of everything, told the girl to take even greater care of the count, and promised that she should not go unrewarded.
The Stinnes of the KGB didn't come West — not as defectors, not as agents, and especially not as solitaries who'd spend the rest of their days unrewarded, unloved, and uninvolved with the job, acting out a role in which they had no belief.